Genesis 32:24-32

but he stayed behind, alone. Then a man came and wrestled with him until just before daybreak. When the man saw that he was not winning the struggle, he struck Jacob on the hip, and it was thrown out of joint. The man said, “Let me go; daylight is coming.” “I won't, unless you bless me,” Jacob answered. “What is your name?” the man asked. “Jacob,” he answered. The man said, “Your name will no longer be Jacob. You have struggled with God and with men, and you have won; so your name will be Israel.” Jacob said, “Now tell me your name.” But he answered, “Why do you want to know my name?” Then he blessed Jacob. Jacob said, “I have seen God face to face, and I am still alive”; so he named the place Peniel. The sun rose as Jacob was leaving Peniel, and he was limping because of his hip. Even today the descendants of Israel do not eat the muscle which is on the hip joint, because it was on this muscle that Jacob was struck.