"عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى قَالَ: صَلَّيْتُ خَلفَ عُمَرَ فَجَهَرَ بِبِسْمِ الله الرَّحْمَنِ الرَّحِيمِ، وَكَان يَجْهرُ بِبِسْمِ الله الرَّحْمَنِ الرَّحِيمِ".
[Machine] The Mahdi prayed with us and recited "In the name of Allah, the Most Gracious, the Most Merciful" out loud. I asked him about that and he said, "My father told me, from his father, from his grandfather, from Ibn Abbas, that the Messenger of Allah ﷺ used to recite 'In the name of Allah, the Most Gracious, the Most Merciful' out loud."
صَلَّى بِنَا الْمَهْدِيُّ فَجَهَرَ بِبِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ فَقُلْتُ لَهُ فِي ذَلِكَ فَقَالَ حَدَّثَنِي أَبِي عَنْ أَبِيهِ عَنْ جَدِّهِ عَنِ ابْنِ عَبَّاسٍ أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَجْهَرُ بِبِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ
[Machine] I prayed behind Umar ibn al-Khattab, and he recited aloud "In the name of Allah, the Most Gracious, the Most Merciful."
صَلَّيْتُ خَلْفَ عُمَرَ بْنِ الْخَطَّابِ فَجَهَرَ بِبِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ
"عَنْ نَافِعٍ: أَنَّ ابْنَ عُمَرَ كَانَ لاَ يَدعُ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ، يَفْتَتِحُ القِرَاءَةَ بِبِسْم اللهِ الرَّحْمن الرَّحيمِ".