'Heels' in the Bible

He will be a snake by the road,a viper beside the path,that bites the horses’ heelsso that its rider falls backward.

Gad will be attacked by raiders,but he will attack their heels.

The princes of Issachar were with Deborah;Issachar was with Barak.They set out at his heels in the valley.There was great searching of heartamong the clans of Reuben.

then the sword you fear will overtake you there in the land of Egypt, and the famine you are worried about will follow on your heels there to Egypt, and you will die there.