'Heels' in the Bible

Dan shall be a serpent on the way, a viper on the road that bites the heels of a horse, so that its rider falls backward.

Bandits shall attack Gad, but he shall attack [their] heels.

"Sudden terrors terrify him all around, and they chase him at his heels.

Why should I fear in {times of calamity}, [when] iniquity surrounds me at my heels,

And if you say in your heart, 'Why have these [things] happened to me?' Because of the greatness of your iniquity your skirts are uncovered; your heels have endured violence.