Isaías 1
Bede
Isaías 1:3
By the ox he designates the people of the Jews, who were accustomed to carry the yoke of the law and to ruminate upon its words; by the donkey he represents the people of the nations, who remained always unclean with the stains of idolatry. From both peoples a great many turned to the grace of the gospel and recognized the owner by whom they were created. [They] were seeking by means of his heavenly nourishing fare to grow toward perpetual salvation. — Homilies on the Gospels 1:6
Isaías 1:16
Now they ask wrongly who persevere in sins and ill-advisedly entreat the Lord to forgive them the sins they do not at all forgive [others]. He condemns such as these through [the mouth of] Isaiah.… Still, having regard for such as these, Isaiah shows in what way they can obtain what they plead for when he goes on. — Homilies on the Gospels 2:14