And Muslim added:

"They would not recite Bismillahir-Rahmanir-Rahim, neither in the beginning of the recitation nor at the end of it."

زَادَ مُسْلِمٌ: { لَا يَذْكُرُونَ : (بِسْمِ اَللَّهِ اَلرَّحْمَنِ اَلرَّحِيمِ )‏ فِي أَوَّلِ قِرَاءَةٍ وَلَا فِي آخِرِهَا } .‏ [1]‏