Sirach 29:10-20

10 Lose thy money for thy brother and thy friend, and let it not rust under a stone to be lost.
11 Lay up thy treasure according to the commandments of the most High, and it shall bring thee more profit than gold.
12 Shut up alms in thy storehouses: and it shall deliver thee from all affliction.
13 It shall fight for thee against thine enemies better than a mighty shield and strong spear.
14 An honest man is surety for his neighbour: but he that is impudent will forsake him.
15 Forget not the friendship of thy surety, for he hath given his life for thee.
16 A sinner will overthrow the good estate of his surety:
17 And he that is of an unthankful mind will leave him that delivered him.
18 Suretiship hath undone many of good estate, and shaken them as a wave of the sea: mighty men hath it driven from their houses, so that they wandered among strange nations.
19 A wicked man transgressing the commandments of the Lord shall fall into suretiship: and he that undertaketh and followeth other men's business for gain shall fall into suits.
20 Help thy neighbour according to thy power, and beware that thou thyself fall not into the same.

The Brenton translation of the Septuagint is in the public domain.