Genesis 49:17

15And he saw that rest was good, and the land that it was pleasant; and bowed his shoulder to bear, and became a servant unto tribute.

16Dan shall judge his people, as one of the tribes of Israel.

17Dan shall be a serpent by the way, an adder in the path, that biteth the horse heels, so that his rider shall fall backward.

18I have waited for thy salvation, O LORD.

19Gad, a troop shall overcome him: but he shall overcome at the last.