Job 31:30 in the King James Version
Neither have I suffered my mouth to sin by wishing a curse to his soul.
Context
29 “If I have rejoiced at the destruction of him who hated me, or lifted up myself when evil found him
30 (I have certainly not allowed my mouth to sin by asking his life with a curse);
31 if the men of my tent have not said, ‘Who can find one who has not been filled with his meat?’