Ben Sira 27:18

18 For as a person destroys his enemy, so you have destroyed the friendship of your neighbor.

Ben Sira 27:18 In-Context

16 Whoever betrays secrets destroys confidence, and will never find a congenial friend.

17 Love your friend and keep faith with him; but if you betray his secrets, do not follow after him.

18 For as a person destroys his enemy, so you have destroyed the friendship of your neighbor.

19 And as you allow a bird to escape from your hand, so you have let your neighbor go, and will not catch him again.

20 Do not go after him, for he is too far off, and has escaped like a gazelle from a snare.