Thomas Aquinas

Third, he sets out the manner of their ignorance: for all the tables were full of vomit, for they gorged themselves in their temples until they vomited, as if they were devoted entirely to idols; and filth, namely, of all their shameful vices: as a dog that returns to his vomit (Prov 26:11), and the sow that was washed to her wallowing in the mire.

Commentary on Isaiah ↗