Bulugh al-Maram, Book 3, Hadith 588 (English) ⓘ
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.’ Related by Al-Bukhari.
وَعَنْ طَلْحَةَ بْنِ عَبْدِ اَللَّهِ بْنِ عَوْفٍ قَالَ: { صَلَّيْتُ خَلَفَ ابْنِ عَبَّاسٍ عَلَى جَنَازَةٍ, فَقَرَأَ فَاتِحَةَ الكْتِابِ فَقَالَ: "لِتَعْلَمُوا أَنَّهَا سُنَّةٌ" } رَوَاهُ اَلْبُخَارِيُّ 1. 1 - صحيح. رواه البخاري (1335).
also referenced under: Book 3, Hadith 32 (In-Book)