Luke 16:10-13
10 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.
11 If therefore ye have not been faithful in the unrighteous mammon, who will commit to your trust the true riches?
12 And if ye have not been faithful in that which is another man's, who shall give you that which is your own?
13 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.
The Grace New Testament Commentary - Luke 16:10-13
16:10 The Lord Jesus then unfolded related principles regarding stewardship. Faithfulness in the least portends that the disciple will act faithfully "also in much." Similarly, unjust dealings in the least forecast the same "also in much." Thus, the disciple's stewardship of relatively insignificant financial resources serves as an indicator of their potential for weightier spiritual responsibilities.
16:11 Disciples who do not faithfully handle "the unrighteous mammon" cannot manage the far more significant spiritual resources and responsibilities that the Lord could potentially entrust to them. And so Jesus asks, "who will commit to your trust the true riches?"
16:12 A disciple's unfaithful use of material resources now - "what is another man's" - will disqualify them from receiving an enduring reward of their own. God, the ultimate Owner of all resources, will evaluate each disciple's present stewardship in order to determine their future reward.
16:13 Disciples cannot divide their love and loyalty between two totally consuming alternatives. Jesus specified, "You cannot serve God and mammon" - wealth personified. The servant's choice will affect their life now and their eternal reward later.