Sirach 29:17LXX

15Shut up alms in the heart of the poor, and it shall obtain help for thee against all evil.

16Better than the shield of the mighty, and better than the spear:

17It shall fight for thee against thy enemy.

18A good man is surety for his neighbour: and he that hath lost shame, will leave him to himself.

19Forget not the kindness of thy surety: for he hath given his life for thee.