תהלים, פרק קל״ה, פסוק י״א

The crushing blow dealt to the enemies of the Israelites focuses on the strongest and most prominent rulers among them. God struck down and killed both Sihon and Og [מצודת ציון, ביאור שטיינזלץ, מצודת דוד]. Commentators agree that these leaders earned a direct mention because of their exceptional power and might. They controlled territories far larger than those of any other kings in Canaan. Additionally, these were the very first kings the Israelites had to face in battle [רד״ק].

After noting these initial and major victories, the account simply groups together all the remaining kingdoms of Canaan that were eventually defeated [רד״ק, אבן עזרא, מצודת דוד].