Yazid bin Sharik reports: He asked Sayyiduna Umar (may Allah be pleased with him) about the issue of recitation behind the Imam, so he replied: "You should recite Surah Al-Fatihah." (The narrator says) I asked: Even if (the Imam) is you? He replied: "Even if (the Imam) is me." (The narrator says) I asked: Even if you are reciting aloud? He replied: "Even if I am reciting aloud (still you should recite Surah Al-Fatihah)." All the narrators of this narration are trustworthy.