Ben Sira - chapter 12

12: 1 - 18 (translated by Edgar Goodspeed)
If you do a kindness, know to whom you are doing it, and you will be thanked for your good deeds.  If you do a kindness to the devout, you will be repaid, if not by him, yet by the Most High.  The one who persists in evil will not prosper, nor the one who will not give to charity.  Give to the devout, and do not help the sinner; do kindnesses to the humble-minded, and do not give to the ungodly; hold back the bread, and do not give it to them, so that they may not come to control you with it; for you will experience twice as much evil for all the good you do them.  For the Most High hates sinners and will take vengeance on the ungodly.  Give to the one who is good, and do not help the sinner.  A friend cannot be proved in prosperity, nor an enemy concealed in adversity.  When someone prospers, his enemies are grieved, and when someone is unfortunate, even his friend separates from him.  Never trust your enemy, for his wickedness is like bronze that rusts; even if he acts humbly, and goes about bent over, look out for yourself, and be on your guard against him.  You must be to him like one who wipes a mirror clean, and you must make sure that it is not all covered with rust.  Do not place him at your side, or he may overthrow you and take your place.  Do not seat him at your right hand, or he may try to get your seat, and you may at last learn the truth of what I say, and be stung by my words.  Who pities a snake-charmer when he is bitten, or all those who have to do with wild animals?  In the same way who will pity a person who approaches a sinner, and mingles with his sins?  He will stay with you for a while, but if you fall, he will not hold out.  An enemy will speak sweetly with his lips, but in his heart he will plan to throw you into a pit.  An enemy will shed tears with his eyes, but if he gets a chance, he cannot get blood enough.  If misfortune overtakes you, you will find him there before you, and while he is pretending to help you, he will trip you up.  He will shake his head and clap his hands, and whisper a great deal, and change his expression toward you.