[Machine] The Messenger of Allah ﷺ used to recite aloud "Bismillah-ir-Rahman-ir-Rahim". Al-Bukhari reported it with a sound chain of narrators including Salim, who was the son of Ajlan al-Aftas, and Muslim also reported it with a chain that includes Sharik. Both of these chains are authentic and have no flaws, and they have not been rejected.
كَانَ رَسُولُ اللَّهِ ﷺ «يَجْهَرُ بِبِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ» «قَدِ احْتَجَّ الْبُخَارِيُّ بِسَالِمٍ هَذَا وَهُوَ ابْنُ عَجْلَانَ الْأَفْطَسُ وَاحْتَجَّ مُسْلِمٌ بِشَرِيكٍ وَهَذَا إِسْنَادٌ صَحِيحٌ وَلَيْسَ لَهُ عِلَّةٌ وَلَمْ يُخَرِّجَاهُ»