Proverbs 14:3

14:3 In the speech of a fool is a rod for his back,

but the words of the wise protect them.

Proverbs 23:13

23:13 Do not withhold discipline from a child;

even if you strike him with the rod, he will not die.

Proverbs 26:3

26:3 A whip for the horse and a bridle for the donkey,

and a rod for the backs of fools!

Proverbs 29:15

29:15 A rod and reproof impart wisdom,

but a child who is unrestrained brings shame to his mother.