And I have seen folly in the prophets of Samaria; they prophesied in Baal, and caused my people Israel to err.
These two verses are to be read together; for there is no doubt but that the Prophet here compares the false prophets, who had corrupted God’s worship in the kingdom of Israel, with those in Jerusalem who wished to appear more holy and more perfect.
Here is a long lesson for the false prophets. As none were more bitter and spiteful against God's true prophets than they, so there were none on whom the true prophets were more severe, and justly. The prophet had complained to God of those false prophets (Jer 14:13), and had often foretold that they should be involved in the common ruin; but here they have woes of their own. I.
Commenting on Jeremiah 23:9-32
And I have seen folly in the prophets of Samaria,.... The ten tribes of Israel, among whom, in Ahab's time there were many false prophets, Baal's prophets, even four hundred and fifty; whose "folly" the Lord had formerly taken notice of; even their idolatry and impiety for giving into which the ten tribes had been carried captive years ago.