In the middle of many anxieties and trials, Jacob was called upon to wrestle all night. He would be then known as Israel, for he strove with man and God and prevailed. Ever since the people of God have been known as those who wrestle with God.
And [Jacob] rose up that night, and took his two wives, and his two handmaids, and his eleven children, and passed over the ford of the Jabbok. And he took them, and sent them over the stream, and sent over that which he had.
And Jacob was left alone; and there wrestled a man with him until the breaking of the day. 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 strained, as he wrestled with him.
And he said, “Let me go, for the day breaketh.”
And he said, “I will not let thee go, except thou bless me.”
And he said unto him, “What is thy name?”
And he said, “Jacob.”
And he said, “Thy name shall be called no more Jacob, but Israel: for thou hast striven with God and with men, and hast prevailed.”
And Jacob asked him, and said, “Tell me, I pray thee, thy name.”
And he said, “Wherefore is it that thou dost ask after my name?” And he blessed him there.
And Jacob called the name of the place Peniel: for, said he, “I have seen God face to face, and my life is preserved.”
And the sun rose upon him as he passed over Penuel, and he limped upon his thigh. Therefore the children of Israel eat not the sinew of the hip which is upon the hollow of the thigh, unto this day: because he touched the hollow of Jacob’s thigh in the sinew of the hip (Genesis 32:22-32).