Midrash for Song of Songs 5:4

Abraham rose up early in the morning, and he took his three disciples, Aner, Eshcol, and Mamre, with him, and Eliezer his servant with him (also), and he pursued after them as far as Dan, which is Pameas, as it is said, "And he pursued as far as Dan" (Gen. 14:14). And there the righteous man was hindered, for there it was told him: Abraham, know thou that in the future thy children's children will serve idols in this place; therefore was he hindered there. Whence do we know that Israel served idols there? Because it is said, "And he made two calves of gold… and he set the || one in Bethel, and the other put he in Dan" (1 Kings 12:28, 29). There he left his three disciples, and he took his servant Eliezer. The numerical value of the letters of his name equals 318. He pursued them as far as the left of Damascus, as it is said, "And he pursued them unto Hobah" (Gen. 14:15).