Deuteronomy 5:11 (DARBY)

Thou shalt not idly utter the name of Jehovah thy God for Jehovah will not hold him guiltless that idly uttereth his name.

Defeat of Sennacherib, 1614
Peter Paul Rubens (Flemish, 1577-1640)

This is what the Lord says: Do not be disturbed by this blasphemous speech against me from the Assyrian king’s messengers. Listen! I myself will move against him, and the king will receive a message that he is needed at home. So he will return to his land, where I will have him killed with a sword.
2 Kings 19:6-7 (NLT)