And when he saw that he could not prevail against him, he smote him under the thigh, and the sinew of Jacob's thigh shrank as he wrestled with him.

Therefore the children of Israel do not eat of the sinew that is over the joint of the thigh, to this day; because he touched the joint of Jacob's thigh the sinew.

because {I know} that you [are] obstinate, and your neck an iron sinew, and your forehead bronze.