Proverbs 13:24 in the World English Bible
One who spares the rod hates his son, but one who loves him is careful to discipline him.
Context
23 Much food is in the tillage of the poor: but there is that is destroyed for want of judgment.
24 He that spareth his rod hateth his son: but he that loveth him chasteneth him betimes.
25 The righteous eateth to the satisfying of his soul: but the belly of the wicked shall want.