Genesis 49:17 KJV
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.
Genesis 49:17, King James Version
In context
16 Dan shall judge his people, as one of the tribes of Israel.
17 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.
18 I have waited for thy salvation, O Lord.