Sayyidina Ubadah ibn Samit (RA) reported that once while Allah’s Mesenge (SAW) led the fajr salah, the recitation of the Qur’an became difficult for him. When he finished, he said, “Perhaps you recite behind your imam.” They replied, “By Allah, yes, 0 Messenger of Allah!” He said, “Do not do it. Recite only the umm ut-Qur’an (surah al-Fa’tihah), for, one who does not recite it has not offered salah.”