Gregory the Great — as excerpted in the Catena Aurea on Luke 16:19-21

“(Hom. 40. in Ev.) Now if the wearing of fine and precious robes were not a fault, the word of God would never have so carefully expressed this. For no one seeks costly garments except for vainglory, that he may seem more honourable than others; for no one wishes to be clothed with such, where he cannot be seen by others.”