'Back' in the Bible

Wisdom is found on the lips of him who has discernment, but a rod is for the back of him who is void of understanding.

The fool's talk brings a rod to his back, but the lips of the wise protect them.

Don't say, "I will pay back evil." Wait for Yahweh, and he will save you.

Rescue those who are being led away to death! Indeed, hold back those who are staggering to the slaughter!

A whip is for the horse, a bridle for the donkey, and a rod for the back of fools!

The sluggard buries his hand in the dish. He is too lazy to bring it back to his mouth.

Whoever digs a pit shall fall into it. Whoever rolls a stone, it will come back on him.