15 Hezekiah prayed before Yahweh, and said, "Yahweh, the God of Israel, who sit (above) the cherubim, you are the God, even you alone, of all the kingdoms of the earth. You have made heaven and earth.
*Minor differences ignored. Grouped by changes, with first version listed as example.
Which dwellest between the cherubims - The reference is to the shechinah, or miraculous glory, which from time to time appeared above the mercy-seat from between the two cherubims, whose wings overshadowed the ark of the covenant (1-Kings 6:23-27; compare Exodus 25:22; Leviticus 16:2, etc.).
Thou art the God, even thou alone - This is the protest of the pure theist against the intense polytheism of Sennacherib's letter, which assumes that gods are only gods of particular nations, and that Hezekiah's God is but one out of an indefinite number, no stronger or more formidable than the rest.
Thou art the God, etc. - Thou art not only God of Israel, but God also of Assyria, and of all the nations of the world.
And Hezekiah (i) prayed before the LORD, and said, O LORD God of Israel, which dwellest [between] the cherubims, thou art the God, [even] thou alone, of all the kingdoms of the earth; thou hast made heaven and earth.
(i) He shows what the true refuge and help is in all dangers, that is, to flee to the Lord by earnest prayer.
In opposition to the delusion of the Assyrians, he describes Jehovah, the God of Israel, as the only God of all the kingdoms of the earth, since He was the Creator of heaven and earth. הכּרבים ישׁב (see at 1-Samuel 4:4 and Exodus 25:22) indicates the covenant-relation into which Jehovah, the almighty Creator and Ruler of the whole world, had entered towards Israel. As the covenant God who was enthroned above the cherubim the Lord was bound to help His people, if they turned to Him with faith in the time of their distress and entreated His assistance; and as the only God of all the world He had the power to help. In Isaiah, צבאות, which is very rare in historical prose, but very common in prophetical addresses, is added to the name יהוה, and thus Jehovah at the very outset is addressed as the God of the universe. On the meaning of צבאות, see at 1-Samuel 1:3. On האלהים הוּא אתּה, see 2-Samuel 7:28 and 1-Kings 18:39.
O Lord God of Israel, &c. - He calls him the God of Israel, because Israel was his peculiar people; but yet the God of the whole earth, not as Sennacherib fancied, the God of Israel only. Let them say what they will, thou art sovereign Lord, the God of gods, even thou alone: Universal Lord of all the kingdoms of the earth; and rightful Lord; for thou hast made heaven and earth. Being creator of all, by an incontestable title thou art owner and ruler of all.
*More commentary available at chapter level.