fom: http://www.thebricktestament.com
Jacob got up that night and sent his two wives, his two slave-girls, and his eleven children, across shallow part of the Jabbok.
The sun rose on him as he went across Peniel, and he limped because of his hip. That is why to this day children of Israel do not eat the sinew which is attached to the socket of the hip, because the man struck the socket of Jacobs hip near the sinew.