John Wesley’s NotesPsalms 136

The God of gods - Who is infinitely superior to all that are called gods, whether angels, or princes, or idols.

Israel - He speaks of all that people as of one man, because they were united together in one body in the worship of God.

Food - To all living creatures. For which God deserves great praises, which the psalmist teaches us to render to God for them, because those who are most concerned, either cannot, or do not perform this duty.
Chapter CXXXVII
Probably this psalm was wrote toward the end of the Babylonish
captivity. Herein the captives complain of the scoffs of their
enemies, yet remember Jerusalem, and foresee the downfall of
Babylon, ver. 1 - 9.