Ecclesiastes 7:21

19Wisdom strengtheneth the wise more than ten mighty men which are in the city.

20For there is not a just man upon earth, that doeth good, and sinneth not.

21Also take no heed unto all words that are spoken; lest thou hear thy servant curse thee:

22For oftentimes also thine own heart knoweth that thou thyself likewise hast cursed others.

23All this have I proved by wisdom: I said, I will be wise; but it was far from me.