Albert Barnes Commentary Psalms 135:11

"Sihon king of the Amorites, And Og king of Bashan, And all the kingdoms of Canaan," — Psalms 135:11 (ASV)

Sihon king of the Amorites ... - These are specimens of what was done, or instances of the mighty kings who were subdued. It is not claimed that all were enumerated. The subjugation of these nations and kings showed the power of God, and laid the foundation for praise.