ما هي الآية القرآنية التي تتحدث عن خروج طائفة لطلب العلم ثم رجوعها لتعليم قومها؟

Perhaps the verse intended is the Almighty’s saying: "And it was not for the believers to go forth [to battle] all at once. For why did not a party from every division among them go forth to obtain understanding in religion and warn their people when they return to them that they might be cautious?" (At-Tawbah: 122).