Deuteronomy 23:18 - Joseph Benson’s Commentary on the Old and New Testaments

The hire of a whore It was a custom among the idolatrous nations for prostitutes to dedicate to the honour of their false gods some part of what they had earned by prostitution. In opposition to which abominable practice this law is thought to have been instituted. Or the price of a dog It is not easy to give any satisfactory account why these two, the price of a whore, and of a dog, are associated in the same law. Thus much seems clear, (from Numbers 18:15,) that the price of a dog is not here rejected because the dog is an unclean creature. Some have thought it is because the dog was worshipped by the Egyptians; that God, to draw his people from or guard them against idolatry, casts this contempt upon that creature in refusing the price it should be sold for. But the most natural sense of the passage seems to be, to take the word dog here in a figurative sense, for the sodomite, or whoremonger, before mentioned, such persons being not improperly styled dogs, on account of their shameless incontinency and brutal manners. Accordingly, men of canine, beastly natures, are called dogs, Matthew 15:26; 2 Peter 2:22;

Revelation 22:15.