Quotation zu Dewarim 1:53

'And it was in the fortieth year in the eleventh month,' on Rosh Chodesh (the first day of) Shevat, [that Moshe] gathered the people and said to them, "The time of my death has arrived; and if there is from [among] you someone who heard a law and forgot it, he should come to me and ask me, and I will elucidate it. And anyone who has a doubt about a question, he should come, and I will explain it to him," as it is stated (Deuteronomy 1:5), "Moses undertook to expound this Torah, saying."