Augustine of Hippo
Catena Aurea · Lukasevangelium 16
And the lord commended the unjust steward, because he had done wisely: for the children of this world are in their generation wiser than the children of light. And I say unto you, Make to yourselves friends of the mammon of unrighteousness; that, when ye fail, they may receive you into everlasting habitations. He that is faithful in that which is least is faithful also in much: and he that is unjust in the least is unjust also in much. If therefore ye have not been faithful in the unrighteous mammon, who will commit to your trust the true riches? And if ye have not been faithful in that which is another man’s, who shall give you that which is your own? No servant can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
(Serm. 113.) That which the Hebrews call mammon, in Latin is “riches.” As if He said, “Make to yourselves friends of the riches of unrighteousness.” Now some misunderstanding this, seize upon the things of others, and so give something to the poor, and think that they are doing what is commanded. That interpretation must be corrected into, Give alms of your righteous labours. (Prov. 3:9. LXX.) For you will not corrupt Christ your Judge. If from the plunder of a poor man, you were to give any thing to the judge that he might decide for you, and that judge should decide for you, such is the force of justice, that you would be ill pleased in yourself. Do not then make to yourself such a God. God is the fountain of Justice, give not your alms then from interest and usury. I speak to the faithful, to whom we dispense the body of Christ. But if you have such money, it is of evil that you have it. Be no longer doers of evil. Zaccheus said, Half my goods I give to the poor. (Luke 19:8.) See how he runs who runs to make friends of the mammon of unrighteousness; and not to be held guilty from any quarter, he says, I If hare taken any thing from any one, I restore fourfold. According to another interpretation, the mammon of unrighteousness are all the riches of the world, whenever they come. For if you seek the true riches, there arc some in which Job when naked abounded, when he had his heart full towards God. The others are called riches from unrighteousness; because they are not true riches, for they are full of poverty, and ever liable to chances. For if they were true riches, they would give you security.