After all that Allah (swt) mentioned about the Battle of Uhud, the disobeying of the archers, the martyrdom, the actions and plots of the Jews, their cunning, misguidance, and hatred, Allah (swt) wants to teach mankind that nothing happens in His kingdom except by His command, and it is a general law:

وَلِلّهِ مُلْكُ السَّمَاوَاتِ وَالأَرْضِ{And to Allah belongs the dominion of the heavens and the earth}: He (swt) is the Owner of everything and able to do all things. Therefore the believer is satisfied and the polytheist, the unbeliever and the ungrateful are warned that this is the property of Allah (swt) and His power, He owns everything, and nothing is beyond his power.

وَاللّهُ عَلَىَ كُلِّ شَيْءٍ قَدِيرٌ {and Allah is over all things competent.}: He owns and decrees, He is the only One Who does what He wills:

قُلِ اللَّهُمَّ مَالِكَ الْمُلْكِ تُؤْتِي الْمُلْكَ مَن تَشَاء وَتَنزِعُ الْمُلْكَ مِمَّن تَشَاء وَتُعِزُّ مَن تَشَاء وَتُذِلُّ مَن تَشَاء بِيَدِكَ الْخَيْرُ إِنَّكَ عَلَىَ كُلِّ شَيْءٍ قَدِيرٌ

{Say, “O Allah, Owner of Sovereignty, You give sovereignty to whom You will and You take sovereignty away from whom You will. You honor whom You will and You humble whom You will. In Your hand is [all] good. Indeed, You are over all things competent.} (Aal-Imran: 26)

Allah (swt) owns who owns, for the kings of the earth think they have the absolute ownership, whereas Allah (swt) is the Owner of the Sovereignty, he owns the heavens and the earth, and whoever is in the heavens and whoever is on the earth.