19. Come and see, the last generation that left Egypt knew everything because Moses revealed it to them all the forty years they were in the wilderness, as I said. We learned that Rabbi Yitzchak said, Even Moses revealed it only on the day he departed from the world, as it is written, "I am a hundred and twenty years old this day" (Devarim 31:2), on the very day HE PASSED AWAY. Hence he did not speak until he was given permission as it is written, "Now therefore write this poem for yourselves" (Ibid. 19). When he did reveal, he did not say 'Give ear, Yisrael,' but, "Give ear, O heavens" (Devarim 32:1).