'Legs' in the Bible

Therefore the Jews, because it was the Preparation Day, so that the bodies wouldn't remain on the cross on the Sabbath (for that Sabbath was a special one), asked of Pilate that their legs might be broken, and that they might be taken away.

Therefore the soldiers came, and broke the legs of the first, and of the other who was crucified with him;

but when they came to Jesus, and saw that he was already dead, they didn't break his legs.