Sayyiduna Ubadah bin Samit (may Allah be pleased with him) narrates that the Prophet Muhammad (peace be upon him) led us in the Fajr prayer, and it became difficult for him to recite (the Qur'an). When he finished the prayer with salam, he said: "You people recite behind me." We said: "Yes." He said: "Do not do so. Only recite Surah Al-Fatihah, because the prayer of the one who does not recite Surah Al-Fatihah is not valid."