Augustine of Hippo

Rightly does God through the prophet reproach the sinful soul that goes whoring away from him and say, "You thought, if you withdrew from me, you would have more?" But like that younger son, why, you have ended up feeding pigs; why, you have lost all things; why, you have remained in want and left it very late before you grew tired and came back. …

Sermon 177:9 ↗

Jerome

First, let us discuss the Hebrew text, which differs greatly from the LXX in this passage. As mentioned above, to the place where it says: 'You have set your bed on a high and lofty mountain,' and it accuses and rebukes her as a prostitute, in the entrance of houses and in dark places, a harlot behind the doors, so that anyone who wished to enter the house would have the pleasure exposed before their eyes. …

Commentary on Isaiah ↗

Thomas Aquinas

And behind the door. Here he designates familiar places, for they would place idols next to the entrance of their houses, so that they might better hold them in memory: he brought me in the vision of God into Jerusalem, near the inner gate, that looked toward the north, where was set the idol of jealousy to provoke to jealousy (Ezek 8:3). For you have discovered yourself near me. Here he adds to the weight of their sin from their violation of the divine covenant, by which they were joined to God like a bride. …

Commentary on Isaiah ↗