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."
Though Abraham kept all the commandments, he was not perfect till he was
THE TALMUD, _Nedarim_, fol. 31, col. 2.