Bulugh al-Maram 564
Arabic hadith text
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).
Translation
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.