Genesis 49:17 in the King James Version
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.
Context
16 “Dan will judge his people, as one of the tribes of Israel.
17 Dan will be a serpent on the trail, an adder in the path, that bites the horse’s heels, so that his rider falls backward.
18 I have waited for your salvation, LORD.