John Chrysostom

But our Lord not only by the honours kept in store for the good, but by threats of punishment upon the bad, leads the hearer to correction, as it follows, But if that servant shall say in his heart, My Lord delayeth his coming.

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

Woe to such servants who, having received the gift of spiritual leadership, destroy the stewardship entrusted to them, eating and drinking and getting drunk — whether you understand this as literal drunkenness (for this too happens with bad leaders of churches who squander the property of the poor), or whether you understand by drunkenness the corruption of the mind in teaching and in the management of property. …

Commentary on Luke ↗

Irenaeus

For this reason the Lord also said, "Let your light so shine before men, that they may see your good deeds, and glorify your Father who is in heaven." And, "Take heed to yourselves, lest perchance your hearts be overcharged with surfeiting, and drunkenness, and worldly cares." And, "Let your loins be girded about, and your lamps burning, and ye like unto men that wait for their Lord, when He returns from the wedding, that when He cometh and knocketh, they may open to Him. …

Against Heresies Book IV ↗

Augustine of Hippo

But many misuse his delay for their own impiety. And the wicked servant says: My lord delays. And he begins to beat his fellow servants and to eat and drink with the drunken. The lord of that servant will come on a day when he does not expect him and at an hour he does not know, and will cut him in pieces. For it is the body of ministers and overseers that gives food to fellow servants in due time. He will cut him in pieces, he says. He has good ones, he has bad ones, he separates the good from the bad. …

Sermon 37 ↗

Bede

But if that servant shall say in his heart, 'My Lord delays to come,' and shall begin to beat the male and female servants, and to eat and drink, and to become drunken. Just as in a faithful and wise steward the entire order of good things is taught, how he should live and be rewarded, so also in this most wicked servant is shown the work and damnation of all condemned overseers, who, neglecting the fear of the Lord, not only indulge in luxury themselves, but also incite their subordinates to wrongdoing. …

On the Gospel of Luke ↗

Bonaventure

But if that servant shall say etc. After he commended the vigilance and providence or care of prelates, here he censures their insolence; which indeed he does by reproving the enormity of sin and by threatening the severity of judgment. First, therefore, as regards the reproving of the enormity of sin, he says: But if that servant shall say in his heart: My lord delays his coming. …

Commentary on Luke, Chapter 12 ↗