Sirach 27:18

18 For as a man hath destroyed his enemy; so hast thou lost the love of thy neighbour.

Sirach 27:18 In-Context

16 Whoso discovereth secrets loseth his credit; and shall never find friend to his mind.

17 Love thy friend, and be faithful unto him: but if thou betrayest his secrets, follow no more after him.

18 For as a man hath destroyed his enemy; so hast thou lost the love of thy neighbour.

19 As one that letteth a bird go out of his hand, so hast thou let thy neighbour go, and shalt not get him again

20 Follow after him no more, for he is too far off; he is as a roe escaped out of the snare.