Sirach 12:11-18

11 If they are humbled and walk away stooped over, look after yourself, and keep up your guard against them. You will be to them as one who polishes a mirror, and you will know that it won't be completely tarnished.
12 Don't put them next to you; they might overthrow you and take your place. Don't sit them on your right side, since they might seek your seat. In the end you will understand my words, and you will be pierced by what I've said.
13 Who pities a snake charmer who gets bitten? Or anyone who goes near wild beasts?
14 So it is with anyone who goes near sinful people and becomes involved in their sins. but if you waver, they won't be loyal.
15 They will remain with you for a time,
16 Enemies speak sweetly with their lips, but in their hearts, they plan to throw you into a ditch. Enemies cry tears with their eyes, but if they find an opportunity, they won't be able to get enough blood.
17 If you meet up with trouble, you will find them there ahead of you; and appearing to help, they will trip you.
18 They will shake their heads and clap their hands, and they will whisper many things and change their faces.