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Daily Mitzvah

Positive Commandment 208; Negative Commandment 271, 272

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Positive Commandment 208 (Digest)
Honest Measurements

"Honest balance, honest weights, an honest dry measure and an honest liquid measure, you shall have"Leviticus 19:36.

We are commanded to have precise and "righteous" measuring implements—scales, weights, and measures.

The Midrash says: "Conditional on this I took you out of Egypt—on condition that you accept the mitzvah of [honest] measures. For one who acknowledges the mitzvah of measures, also acknowledges the Exodus from Egypt; and one who rejects the mitzah of measures, also denies the Exodus from Egypt."

Negative Commandment 271 (Digest)
Falsifying Measurements

"You shall do no unrighteousness in judgment; in measure, in weight or in land measure"Leviticus 19:35.

It is forbidden to be dishonest in the course of surveying land, or measuring or weighing substances. When surveying land, it must be done according to the principles of engineering—not randomly, by "guess-timate," as is so often done.

Negative Commandment 272 (Digest)
Maintaining an Unbalanced Measure

"You shall not have in your bag diverse weights, large and small"—Deuteronomy 25:13.

It is forbidden to even harbor in one's possession an unbalanced weight or measuring implement—even if there's no intention to use them. As the Talmud says, "even if it is being used as a commode!"

Translation of (the unabridged text of) Sefer Hamitzvot by Rabbi Berel Bell, member of the Rabbinical Court of Montreal and director of Teacher Training for the Jewish Learning Institute.

From "Sefer Hamitzvot in English," published by Sichos in English.
Daily Quote
Our sages have said, "Words which come from the heart, enter the heart." It therefore follows that if you have failed to have a positive influence on your fellow, the fault lies not with him or her, but with yourself. Had you truly been sincere, your words would certainly have been effective.
  –Rabbi Yosef Yitzchak of Lubavitch (Hayom Yom, Iyar 26)
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