Charles Ellicott Commentary Isaiah 37:16

"O Jehovah of hosts, the God of Israel, that sittest [above] the cherubim, thou art the God, even thou alone, of all the kingdoms of the earth; thou hast made heaven and earth." — Isaiah 37:16 (ASV)

That dwellest between the cherubims. —A similar phrase in Psalms 18:10 refers, apparently, to the dark thunder-clouds of heaven. Here, probably, the reference is to the glory-cloud which was the symbol of the Divine presence, and which rested, when it manifested itself, between the cherubim of the ark (Numbers 7:89), those figures also symbolizing the elemental forces of the heavens. (Compare Psalms 68:33.)

Thou art the God, even thou alone. —The absolute monotheism of the faith of Israel is placed in strong antithesis to the polytheism of Rabshakeh (Isaiah 37:12). (Compare Jeremiah 10:11, and Isaiah 40-42.)