And the 83rd mitzvah is that we are commanded to fulfill all our responsibilities1 on the next of the three festivals.2 In this way not a single festival will pass by without our having offered every sacrifice which was promised.

The source of this commandment is G‑d's statement3 (exalted be He), "You shall seek His presence and you shall go there, and there you must bring your burnt-offerings..."

The idea conveyed by this commandment is that at the time that you go to the Temple — i.e., each of the three festivals — you must bring every offering in which you are obligated. In the words of the Sifri: "Why was the phrase 'you shall go there...you must bring...' written? To make it obligatory to bring [your offering] on the next festival." It also says there, "One transgresses the prohibition 'do not be late'4 only when all the year's festivals have passed." This means that if all three festivals have passed and one still did not bring the offering, one has transgressed a prohibition; but if only one festival has passed, one violates only the positive commandment.

In tractate Rosh Hashanah,5 "Rava said, 'Once one festival has passed, one violates the positive commandment.' " The Talmud6 also says: "What is the source for the opinion of Rabbi Meir [who says that there is also a prohibition, even if only one festival has passed]? It is the phrase, 'you shall go there; and there you must bring' — when you come, you must bring [and if you do not, you transgress the prohibition]. But the Sages say that this phrase is only for the positive commandment."7 It is therefore clearly explained that the phrase "there you must bring" constitutes a positive commandment.

This commandment dictates that one must fulfill all one's obligations on each festival, and includes everything the person donates to G‑d. All sacrifices, damim,8 erachin,9 charamim,10 objects donated to the Temple fund, leket, shikchah, and pe'ah11 are identical as far as this law is concerned. It is a positive commandment to bring all of them on the very next festival, as explained in tractate Rosh Hashanah.