Rambam - 1 Chapter a Day

When a plaintiff1 demands that witnesses testify concerning a matter that through their testimony alone2 will obligate the defendant to pay this plaintiff a financial claim involving moveable property,3 [the witnesses] denied [knowing] testimony and took an oath to this effect - whether in a court of law or outside of it - they are liable for sh'vuat haedut,4 for they caused the plaintiff a financial loss through their denial.

Similarly, if the plaintiff administered an oath to them and they denied the matter, [they are liable] even though they did not take an oath or answer Amen to the oath he [administered]. Since they denied the matter, they are liable, provided he administered the oath to them in court.5

The witnesses are not liable for a sh'vuat haedut unless they deny [knowing testimony] in court. Whether they took the oath or the oath was administered to them in court or outside the court, the denial must be in court alone, as [can be derived from Leviticus 5:1]: "If he will not testify, he will bear his sin." [Implied is that] in the place he will testify and [that testimony] will have an effect,6 there, if he does not testify, he will be liable.

When the plaintiff demands [that the witnesses] testify concerning a claim that does not involve a financial obligation,7 concerns landed property, servants, or promissory notes, they deny [knowing testimony], and take an oath to that effect, they are not liable for a sh'vuat haedut. For they are liable when denying testimony concerning financial claims that resemble an entrusted object, a [financial] deposit, a robbery, or a lost object which the verse8 mentions in this passage. This refers to moveable property which is itself of financial worth9 that were they to testify on [the plaintiff's] behalf, [the defendant] would have to pay.

Similarly, when one administers an oath to witnesses who [can testify regarding] a fine and they deny [knowledge] of the matter, they are not liable for a sh'vuat haedut. [The rationale is that] were the defendant to come and acknowledge his liability for the fine first,10 he would not be liable to pay even though the witnesses came afterwards and testified accordingly. Thus the witnesses did not make him liable through their testimony alone. Instead, it was their testimony together with the denial of the defendant that made him liable. Since their testimony would not be effective if he acknowledged [his liability], if they denied [knowing of] the matter and took an oath, they are not liable.

[When a plaintiff administers an oath to witnesses, saying:] "I am making you take an oath that you come and testify on my behalf that so-and-so owes me a double payment"11 or a four- or five-fold payment12 and the witnesses deny [knowledge of the matter], they are liable for a sh'vuat haedut because of the principal which is a financial obligation,13 but not because of the double payment which is a fine.

Similarly, if he administered an oath that they testify that so-and-so raped or seduced his daughter and they deny [knowledge of the matter], they are liable for a sh'vuat haedut because of the [payment due] for embarrassment and damages.14 For if the defendant acknowledged his obligation, he would have to pay these obligations, but not because of the fine. Similar laws apply in all analogous situations.

Witnesses are not liable for a sh'vuat haedut until they deny [knowledge of the matter] and take an oath after the plaintiff or his agent15 demand [that they testify]. If, however, they take an oath first, before a demand is made of them, they are not liable for a sh'vuat haedut.

What is implied? [The witnesses] saw the plaintiff following after them, they told him: "Why are you following us? We are taking an oath that we do not know any testimony involving you," they are not liable for a sh'vuat haedut. [The rationale is that] the plaintiff did not make a demand of them. Instead, they took the oath first on their own initiative.16

Similarly, if the defendant administered an oath to them that if they knew testimony involving the plaintiff they should come and testify and they deny [knowledge of the matter], they are not liable for a sh'vuat haedut unless the plaintiff makes them take the oath.17 Needless to say, if he administered an oath that they should come to testify that so-and-so owes so-and-so money and they deny [knowledge of the matter], they are not liable. For the person making this demand is not the plaintiff himself. Similarly, if the oath preceded [their knowledge of] the testimony, they are not liable for a sh'vuat haedut, as [implied by Leviticus 5:1]: "And he heard the voice of an oath [when] he was a witness." [It can be inferred that knowledge of] the testimony preceded the oath and not that the oath preceded the knowledge of the testimony.

What is implied? [The plaintiff says:] "I am administering to you an oath that if you will know of testimony concerning me that you come and testify," and the witnesses responded Amen and afterwards they observed a matter concerning him.18 If he demands that they testify and they deny [knowledge of the matter], they are not liable for a sh'vuat haedut.

Witnesses are not liable for a sh'vuat haedut until the plaintiff singles them out and administers an oath to them or they take an oath.19

What is implied? A person stood up in a synagogue and said: "I am administering an oath to anyone who knows testimony concerning me to come and testify on my behalf." They all - including his witnesses - responded Amen. Afterwards, he demanded of his witnesses that they testify and they denied [knowledge of the matter]. They are not liable for a sh'vuat haedut, because he did not single out the witnesses individually. If, however, he said: "I am administering an oath to all of those standing here that if they know testimony concerning me to come and testify on my behalf." [If] his witnesses were among those present and [then] they denied [knowledge of the matter], they are liable for a sh'vuat haedut, because he singled them out among the others.20

Similarly, if he told the witnesses: "Come and testify on my behalf that so-and-so owes me a maneh" and then stands in a synagogue and said: "I am administering an oath to anyone who knows testimony concerning me to come and testify on my behalf," should they not come and testify, they are liable, because he made a demand of them previously. [This applies] provided they are present in the synagogue and a court is also there.21 If a court was not present, they are liable for a sh'vuat haedut if they answered Amen and deny [knowledge of the matter] while in a court of law.22 If they did not answer Amen, they are not liable.

Whether one administers an oath to his witnesses or tells them "I am commanding you with an oath" or "I am binding you with an oath," they are liable provided he administers the oath23 with God's name or with one of the terms used to describe Him as explained.24

The witnesses are not liable unless the oath is administered to them in a language that they understand.25

Thus you have learned that witnesses are not liable for a sh'vuat haedut unless ten conditions are [met]. They are:26

a) [The witnesses] must be charged [with testifying] by the plaintiff;

b) [The matter] must involve a financial claim;

c) It must involve movable property;

d) Their testimony alone, had it been given, would be sufficient to require the defendant to pay;

e) They must deny [knowledge of the matter] after the plaintiff charges them;

f) They must issue their denial in court;

g) God's name or a term used to describe Him must be mentioned in the oath;

h) The knowledge of the matter must precede the oath;

i) The witnesses must be singled out at the time of the oath or at the time they are charged;

j) The oath must be in a language that they understand.

Whenever we have used the expression "they are not liable" [in this chapter], the intent is that they are not liable for a sh'vuat haedut. They are, however, liable for a sh'vuat bitui, provided they take the oath or answer Amen to an oath administered by a colleague, because they took a false oath.27

When, by contrast, one is liable for a sh'vuat haedut, he is only liable for a sh'vuat haedut and is not liable for a sh'vuat bitui, even though he took a false oath and did so intentionally. [The rationale is that] the Torah removed a sh'vuat haedut from the category of sh'vuat bitui to make a person who deliberately [takes a false oath] liable for a sacrifice for its violation just as one who took it inadvertently.28 He is not, however, liable for lashes, as [can be derived from Leviticus 5:5 which] states: "For one of these."29 A person who takes a [false] oath is liable for one type of oath, but not two. [We do not hold him liable for both] a sh'vuat haedut and a sh'vuat bitui.

[When the plaintiff says: "I am administering] an oath to you unless you come and testify that so-and-so has an entrusted object, a [financial] deposit, stolen property, and a lost object of mine in his possession," [and the witnesses respond: "We are taking] an oath that we do not know of any testimony concerning you," they are liable for only one [sacrifice].30 [If they say: "We are taking] an oath that we do not know of any testimony concerning an entrusted object, a [financial] deposit, stolen property, and a lost object of yours in so-and-so's possession, they are liable for each [statement].31

[When the plaintiff says: "I am administering] an oath to you unless you come and testify that so-and-so has wheat, barley, and buckwheat of mine in his possession," and [the defendant responds]: "[We are taking] an oath that we do not know of any testimony concerning you," they are liable for only one [sacrifice].32 [If they answer: "We are taking] an oath that we do not know of any testimony concerning any wheat, barley, and buckwheat of yours in his possession," he is liable for each [statement].

Similarly, if many people charged them with testifying and they said: "[We are taking] an oath that we do not know of any testimony concerning you," they are liable for only one [sacrifice]. [If they said:] "...concerning you, and you, and you," they are liable for each [statement], as explained with regard to sh'vuat hapikadon.33

When a person administers an oath to a colleague that he knows testimony concerning him and ultimately, it is discovered that he does not know testimony, [the colleague] is not liable, neither for a sh'vuat haedut34, nor for a sh'vuat bitui. [The rationale is that] a sh'vuat bitui involves only matters that have both a positive and negative dimension.35 Were the person to have said: "I am taking an oath that I do not know testimony concerning you," that would not be a sh'vuat bitui, but instead a sh'vuat haedut. Hence since the negative dimension of the statement is not a sh'vuat bitui, the positive dimension, taking an oath that one knows testimony, is not a sh'vuat bitui.36

It is clear that when a person takes an oath to a colleague that he testified on his behalf and he did not testify or that he did not testify and he testified, he is liable for a sh'vuat bitui;37 there is no connection to a sh'vuat haedut at all.38