Genesis:32:25-26
kjv@Genesis:32:25 @ And when he saw that he prevailed not against him, he touched the hollow of his thigh; and the hollow of Jacob's thigh was out of joint, as he wrestled with him.
kjv@Genesis:32:26 @ And he said, Let me go, for the day breaketh. And he said, I will not let thee go, except thou bless me.