Sirach 12:10LXX

8A friend shall not be known in prosperity, and an enemy shall not be hidden in adversity.

9In the prosperity of a man, his enemies are grieved: and a friend is known in his adversity.

10Never trust thy enemy: for as a brass pot his wickedness rusteth:

11Though he humble himself and go crouching, yet take good heed and beware of him.

12Set him not by thee, neither let him sit on thy right hand, lest he turn into thy place, and seek to take thy seat: and at the last thou acknowledge my words, and be pricked with my sayings.