Genesis 49:16

Issachar is a strong ass couching down between two burdens:

And 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.

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

I have waited for thy salvation, O LORD.