(1)
Talhah bin 'AbduIlah bin 'Auf (RAA) narrated, 'I offered a funeral prayer led by Ibn 'Abbas. He recited al-Fatihah and said, 'You should know that it (reciting al-Fatihah) is a Sunnah of the Prophet (ﷺ).' Related by Al-Bukhari.
Reference: Bulugh al-Maram 564
In-book reference: Book 3, Hadith 32
English translation: Book 3, Hadith 588