His method of instruction was as follows: first came Aaron, to whom he imparted the word of God, and as soon as he had finished with Aaron, came the sons of Aaron, Eleazar and Ithamar, and he instructed them, while Aaron sat at his right hand, listening. When he had finished with the sons of Aaron, the elders appeared to receive instruction, while Eleazar sat at the right hand of his father, and Ithamar at the left hand of Moses, and listened; and when he had finished with the elders, the people came and received instruction, whereupon Moses withdrew.
Then Aaron went over what had been taught, and his sons likewise, and the elders, until every one, from Aaron down to every man out of the people, had four times repeated what he had learned, for in this way had God bidden Moses impress the Torah four times upon Israel.