A Galilean taught, while standing above Rav Ḥisda: Blessed is the all-Merciful One, Who gave the threefold Torah: Torah, Prophets, and Writings, to the three-fold nation: Priests, Levites, and Israelites, by means of a third-born: Moses, who followed Aaron and Miriam in birth order, on the third day of the separation of men and women, in the third month: Sivan. Shabbat 88a (Sefaria translation)