'Heel' in the Bible

and I will put enmity between thee and the woman, and between thy seed and her seed: he shall bruise thy head, and thou shalt bruise his heel.

And after that came forth his brother, and his hand had hold on Esau's heel. And his name was called Jacob. And Isaac was threescore years old when she bare them.

Gad, a troop shall press upon him; But he shall press upon their heel.