Abraham was Ethan the Ezrahite, who is mentioned in Ps. lxxxvii. 1.
Bava Bathra, fol. 15, col. 1.
Abraham's mother was Amathlai, the daughter of Karnebo.
Bava Bathra, fol. 91, col. 1.
Abraham was the head of a seminary for youth, and kept both laws, the written and the oral.
Yoma, fol. 28, col. 2.
Abraham observed the whole ceremonial law, even before it was given on Sinai.
Kiddushin, fol. 82, col. 1.
From the day Abraham was compelled to leave the idolatrous worship and country of his fathers, it is reasonable to suppose that his tent would become a rendezvous for his neighbors who shrunk like himself from the abominations around them. There, from his character, by which he recommended himself as the friend of God, he might very naturally be looked upon as a religious teacher, and men might gather together to learn from his lips or profit by his example. Hence, making due allowance for Eastern hyperbole, the statement of the Book of Jasher (chap. xxvi. verse 36) is not undeserving of credit, where it is said that "Abraham brought all the children of the land to the service of God, and he taught them the ways of the Lord." The same remark applies to what is said in Targ. Yerushalmi (Gen. xxi.), that Abraham's guests went not away until "he had made them proselytes, and had taught them the way everlasting." His son Isaac, says the Targ. of Ben Uzziel, went to school at the "Beth Medrasha de Shem Rabba."