Gregory the Great — as excerpted in the Catena Aurea on Luke 16:27-31

“(in Hom. 40. in Ev.) Lazarus then full of sores, figuratively represents the Gentile people, who when turned to God, were not ashamed to confess their sins. Their wound was in the skin. For what is confession of sins but a certain bursting forth of wounds. But Lazarus, full of wounds, desired to be fed by the crumbs which fell from the rich man’s table, and no one gave to him; because that proud people disdained to admit any Gentile to the knowledge of the Law, and words flowed down to him from knowledge, as the crumbs fell from the table.”