תהלים, פרק קל״ו, פסוק י״ט

The continuous praise for the military victories of the Israelites naturally moves into a detailed account of the specific great kings who were defeated [אלשיך]. Gratitude is directed toward God for the downfall and death of Sihon, the king of the Amorites [ביאור שטיינזלץ].

Sihon is not simply grouped with other defeated rulers; he receives a separate and distinct mention. This special attention is due to his immense power and formidable strength, which made his defeat a highly significant event [מצודת דוד, מאירי]. Furthermore, the war against him stands out because it took place chronologically earlier than the military campaigns against the other kings, marking the first of these major battles [מאירי].