Isaiah
Isaiah 37:6BSB·traditional attribution

who replied, “Tell your master that this is what the LORD says: ‘Do not be afraid of the words you have heard, with which the servants of the king of Assyria have blasphemed Me.

John Calvin Reformed @genevareformer

6. Thus saith Jehovah. Isaiah begins by saying that he gives the reply in the name of God, and expressly declares that the oracle comes from God, both because prophets ought always to beware of bringing forward anything of their own, and because in so difficult a matter the authority of God was needful. In this manner also, the Prophet shewed that he met the prayers of the pious king.

Matthew Henry Presbyterian @wholebiblehenry

We may observe here, 1. That the best way to baffle the malicious designs of our enemies against us is to be driven by them to God and to our duty and so to fetch meat out of the eater. Rabshakeh intended to frighten Hezekiah from the Lord, but it proves that he frightens him to the Lord.

Commenting on Isaiah 37:1-7

John Gill Reformed Baptist @doctorgill

Behold, I will send a blast upon him,.... The king of Assyria; a pestilential one, as he afterwards did, which destroyed his army: or, I will put a spirit into him (s); a spirit of fear and dread, which will oblige him to desist from his purposes, and flee; though some interpret it only of an inclination, a will (t) in him, to return: it...