Why Abraham's Strength Failed at Dan Pursuing the Kings

(Gen. 14:14:) AND HE PURSUED AS FAR AS DAN. Our Rabbis said: What did he see that he pursued as far as Dan? Rather, two things strike before them and after them, and these are they: idolatry, and one who plants on the eve of the Sabbatical year and at the close of the Sabbatical year. Just as one who plants on the eve of the Sabbatical year and at the close of the Sabbatical year is liable, so too idolatry strikes before it and after it. For until now Jeroboam ben Nebat, who made idolatry, had not yet arisen; Abraham saw it, as it is said (in 1 Kings 12:29): AND HE SET ONE IN BETHEL, AND THE OTHER HE [PLACED] IN DAN. And once Abraham reached that place his strength weakened and he did not pursue, as it is said: AND HE PURSUED AS FAR AS DAN, for he judged them and found them guilty, as it is said (in Gen. 14:15): AND HE PURSUED THEM AS FAR AS HOBAH.