Augustine of Hippo

Note that "the master of the house came in to look at the guests." See, my beloved, the servants' business was only to invite and bring in the good and bad. It is not said that the servants took notice of the guests, found among them a man who had no wedding garment and spoke to him. This is not written. The master of the house came in, the master saw him, the master of the house inspected, the master of the house hauled him off and threw him out. It is not fitting to pass over this quickly. …

Sermon 90.4 ↗

Gregory the Dialogist

Consider, I ask, whether you have come to this wedding feast with a wedding garment; examine your thoughts with anxious inquiry. Weigh your hearts concerning each matter: whether you now hold hatred against no one, whether you are not inflamed by any torch of envy against another's good fortune, whether you do not hasten to harm anyone through hidden malice. …

Forty Gospel Homilies, Homily 38 ↗

Thomas Aquinas

Then follows the examination. Then he says how he fell short. He says therefore, friend. He calls him friend on account of faith, or because he himself loved him. Or it can be said that wherever he calls someone friend, he says it by way of reproach: hence he reproaches the love with which he loved him. How camest thou in hither not having a wedding garment? But someone could say: on what occasion did he punish that man, since he called good and bad? …

Commentary on Matthew ↗