Luke 16:10-13

He that is faithful in a very little is faithful also in much: and he that is unrighteous in a very little is unrighteous 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’s, who will 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 one, and despise the other. Ye cannot serve God and mammon.