A man from the desert people narrates from his father, who had been held as a captive with the Prophet (peace and blessings be upon him). He relates: I heard Sayyiduna Muhammad (peace and blessings be upon him) say: "A prayer in which Surah al-Fatihah is not recited is not accepted." Its chain contains a narrator who is not named.
Ahmad recorded it.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2657