Psalms 106:39

Thus were they defiled with their own works
Not the land only, but they themselves also; or "with their works" ^F1, with the works of the Heathen they learned, ( Psalms 106:35 ) , or rather with their own works, the works of the flesh, especially their shocking idolatries: sin is of a defiling nature; it has defiled all men, it defiles all of men, all the faculties of their souls, and all the members of their bodies; nor can anything truly and thoroughly cleanse from it but the blood of Christ: even men's works of righteousness are as filthy rags and defiling, and much more their evil works.

And went a whoring with their own inventions;
after other gods; idolatry is often in Scripture signified by whoredom; the idolatry of Israel and Judah is represented by two harlots and their lewd practices, in ( Ezekiel 23:1 ) and hence the apostate church of Rome is compared to a whore, because of her idolatry, ( Revelation 17:1 Revelation 17:2 Revelation 17:5 ) .

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FOOTNOTES:

F1 (Mhyvemb) "operibus earum", Muis; so Ainsworth.