Proverbs 30:10 in the King James Version
Accuse not a servant unto his master, lest he curse thee, and thou be found guilty.
Context
9 lest I be full, deny you, and say, ‘Who is the LORD?’ or lest I be poor, and steal, and so dishonor the name of my God.
10 “Don’t slander a servant to his master, lest he curse you, and you be held guilty.
11 There is a generation that curses their father, and doesn’t bless their mother.