Theophylact of Ohrid

He called wealth that remains with us "unrighteous," for if it were not unrighteous, it would not be with us. But now, since it is with us, it is evident that it is unrighteous, as it has been held back by us and not distributed to the poor. For the seizure of another's property and of what belongs to the destitute is injustice. Therefore, whoever does not manage this property well and faithfully, how can the "true" wealth be entrusted to him?

Commentary on Luke ↗

Cyprian

In fine, He calls those the children of Abraham whom He sees to be laborious in aiding and nourishing the poor. For when Zacchaeus said, "Behold, the half of my goods I give to the poor; and if I have done any wrong to any man, I restore fourfold," Jesus answered and said, "That salvation has this day come to this house, for that he also is a son of Abraham." For if Abraham believed in God, and it was counted unto him for righteousness, certainly he who gives alms according to God's precept believes in God, and he who has the truth …

Treatise VIII On Works and Alms ↗

Irenaeus

For life does not arise from us, nor from our own nature; but it is bestowed according to the grace of God. And therefore he who shall preserve the life bestowed upon him, and give thanks to Him who imparted it, shall receive also length of days for ever and ever. But he who shall reject it, and prove himself ungrateful to his Maker, inasmuch as he has been created, and has not recognised Him who bestowed [the gift upon him], deprives himself of [the privilege of] continuance for ever and ever. …

Against Heresies Book II ↗

Bonaventure

Second, as to the consideration of peril and loss, he adds: If therefore you have not been faithful in the unrighteous mammon, who will entrust to you that which is true? As if to say: the peril of badly dispensing these temporal goods is great, because through unfaithful dispensation one loses true riches. …

Commentary on Luke, Chapter 16 ↗