The thighs were thought to play a part in procreation (; , English Versions of the Bible “loinsâ€; , English Versions of the Bible “bodyâ€; compare ff), so that an oath taken with the hand under the thigh (, ; ) was taken by the life-power (the rabbis interpreted “by the seal of circumcisionâ€). It is perhaps significant that this oath in both Gen 24 and 47 is said to have been exacted by persons in danger of death. Doubtless this association of the thigh with life (aided perhaps by its excellence as food (; )) determined its choice as a sacrificial potion (, etc.; on the “heave thigh†see SACRIFICE). Consequently, it is natural to find the thigh classed as forbidden (“sacredâ€) food among certain peoples, and, probably, this sacred character of the part is the real basis of : “The children of Israel eat not the sinew of the hip which is upon the hollow of the thigh, unto this day.†The origin of the prohibition, however, was unknown to the writer of the verse, and he sought an explanation from a story in which special attention was called to the thigh. Nothing else is heard about this precept in the Old Testament, but it receives elaborate attention in the Mishna (HÌ£ullı̄n vii), where, for instance, all food cooked with meat containing the sinew (nervus ischiadicus) is rendered unclean if the sinew imparts a flavor to it, but not otherwise. (For further details see the comms., especially Skinner. (ICC) and RS2, 380.) One of the proofs of guilt in the jealousy trial () was the falling-away of the “thigh†(a euphemism; see JEALOUSY). To smite upon the thigh was a token of contrition () or of terror (Ezr ).