Charles Spurgeon Commentary Isaiah 57:3-4

"But draw near hither, ye sons of the sorceress, the seed of the adulterer and the harlot. Against whom do ye sport yourselves? against whom make ye a wide mouth, and put out the tongue? are ye not children of transgression, a seed of falsehood," — Isaiah 57:3-4 (ASV)

Because this people so exalted themselves against God and his gospel, God would not acknowledge them as the true seed of Israel at all. He declares them to be a false, degenerate breed, and he asks them how they dare to sport against his prophets, and draw out the tongue, and make a wide mouth against those who spoke for the God of Israel.