Genesis 49:16 Meaning

14Issachar is a strong ass couching down between two burdens:

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.