Cross reference
Proverbs 29:19
19 A servant will not be corrected by words: for though he understand he will not answer.
Job 19:16
16 I called my servant, and he gave me no answer; I intreated him with my mouth.
Proverbs 26:3
3 A whip for the horse, a bridle for the ass, and a rod for the fool's back.
Proverbs 30:22
22 For a servant when he reigneth; and a fool when he is filled with meat;