Ecclesiastes 7:22 in the World English Bible
for often your own heart knows that you yourself have likewise cursed others.
Context
21 Also take no heed unto all words that are spoken; lest thou hear thy servant curse thee:
22 For oftentimes also thine own heart knoweth that thou thyself likewise hast cursed others.
23 All this have I proved by wisdom: I said, I will be wise; but it was far from me.