There was in the days of Herod, the king of Judea, a certain priest named Zacharias, of the priestly division of Abijah. He had a wife of the daughters of Aaron, and her name was Elizabeth.
"says Rab Chama bar Guria, says Rab, Moses ordered for the Israelites eight courses, four from Eleazar, and four from Ithamar; Samuel came and made them "sixteen"; David came and made them twenty four.--It is a tradition, that Moses ordered for the Israelites sixteen courses, eight from Eleazar, and eight from Ithamar; and when the children of Eleazar increased above the children of Ithamar, they divided them, and appointed them twenty four.''