اَخْبَرَنَا سُفْیَانُ، عَنْ عَمْرِو بْنِ دِیْنَارٍ، عَنْ اَبِیْ مَعْبَدٍ، قَالَ: صَلَّی ابْنُ عَبَّاسٍ عَلٰی جَنَازَةٍ، فَکَبَّرَ ثُمَّ قَرَأَ بِفَاتِحَةِ الْکِتَابِ، وَجَهَرً بِهَا ثُمَّ کَبَّرَ بَعْدَ ذٰلِکَ ثَـلَاثًا، فَقَالَ: اِنِّیْ اِنَّمَا جَهَرْتُ لِتَعْلَمُوْا اَنَّهَا سُنَّةٌ.
Abu Ma'bad narrated: Sayyiduna Ibn Abbas (may Allah be pleased with them both) led the funeral prayer, then said Allahu Akbar, then recited Surah Al-Fatihah and recited it aloud, then after that said three takbirs, and said: I recited aloud so that you may know that this is the Sunnah.