Ben Sira 12:11-18

11 Watch out, and be on guard against him, even if he acts ever so humble. He is like a metal mirror that rusts away if you don't keep it polished.
12 Seat an enemy at your right hand, and the next thing you know he'll be trying to get your own place of honor. Put him next to you, and he will overthrow you. Then you will realize the truth of my words, and be stung with regret when you remember them.
13 Nobody feels sorry for snake charmers or wild animal tamers who get bitten,
14 and nobody will feel sorry for you if you run around with sinners and get involved in their wrongdoing.
15 An enemy will stay with you for a while, but not when trouble comes.
16 He will speak fine words while he plots how to trap you. He will pretend to share your sorrows, but he will kill you if he gets a chance.
17 If trouble comes your way, you will find him waiting, ready to trip you up while he pretends to help you.
18 He will be a different person then, rubbing his hands, nodding his head, and spreading rumors about you.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.