أَلَيْسَ اللَّهُ بِكَافٍ عَبْدَهُ
Is Allah not sufficient for His servant?
Taqrīr places the hearer in a position to acknowledge a truth already known or considered beyond reasonable denial. A-laysa Allāhu bi-kāfin ʿabdahu is not a genuine expression of uncertainty about divine sufficiency.
The rhetorical question has a force beyond a flat assertion: the listener is drawn into affirming what their own knowledge should establish.