Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:10651Aḥmad b. Muḥammad b. Yaḥyá b. Ḥamzah al-Dimashqī from my father from his father

[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."  

الطبراني:١٠٦٥١حَدَّثَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ يَحْيَى بْنِ حَمْزَةَ الدِّمَشْقِيُّ حَدَّثَنِي أَبِي عَنْ أَبِيهِ قَالَ

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  


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Collected by Suyūṭī
suyuti:2-356bʿAbd al-Raḥman b. Abzá
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السيوطي:٢-٣٥٦b

"عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى قَالَ: صَلَّيْتُ خَلفَ عُمَرَ فَجَهَرَ بِبِسْمِ الله الرَّحْمَنِ الرَّحِيمِ، وَكَان يَجْهرُ بِبِسْمِ الله الرَّحْمَنِ الرَّحِيمِ".  

الطحاوى، [ق] البيهقى في السنن