'Back' in the Bible

my son, walk not in the way with them, keep back thy foot from their path;

In the lips of an intelligent man wisdom is found; but a rod is for the back of him that is void of understanding.

Judgments are prepared for scorners, and stripes for the back of the foolish.

that I might make thee know the certainty of the words of truth; that thou mightest carry back words of truth to them that send thee?

A whip for the horse, a bridle for the ass, and a rod for the back of fools.

As a dog turneth back to its vomit, so a fool repeateth his folly.

A fool uttereth all his mind; but a wise man keepeth it back.