Matthew Poole and continuators on 2 Kings 19:4

4 It may be the LORD thy God will hear all the words of Rab-shakeh, whom the king of Assyria his master hath sent to reproach the living God, and will reprove the words which the LORD thy God hath heard: wherefore lift up thy prayer for the remnant that are left.

He speaks doubtfully, because he knew not whether God would not deliver them all up into the Assyrians hand, as he, and his people deserved. But sometimes this is not a word of doubt, but of good hope; as Numb. 22. 33. Iosh. 14. 12.

To whom thou art dear and precious. He saith not our God, because he seemed to have forsaken and rejected them; and they, by their Designs had forfeited all their Interest in him.

i. e. Will shew by his Actions, that he hath heard them with just Indignation.

Or rather, will reprove him, (An Ellipsis of the Pronoun, which is frequent in the Hebrew Tongue) for the words, as the Syriack, and Arabick, and Caldee render it.

This he mentions as an Argument, to stir up Isaiah to pray, and to move God's Compassion towards them; That they were but a small Remnant either of God's People, of whom Ten Tribes were now lost: or of the Kingdom of Iudah, which had been greatly wasted and depopulated in the days of Ahaz; and now lately by this Assyrian, ver. 13.

Marginal references: Heb. sound.