Ecclesiasticus 12:10
9. In the prosperity of a man enemies will be grieved: but in his adversity even a friend will depart.10. Never trust thine enemy: for like as iron rusteth, so is his wickedness.11. Though he humble himself, and go crouching, yet take good heed and beware of him, and thou shalt be unto him as if thou hadst wiped a lookingglass, and thou shalt know that his rust hath not been altogether wiped away.
Ecclesiasticus თავი 12