وَعَنْ أَبِي هُرَيْرَةَ رضى الله عنه
قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«إِذَا قَرَأْتُمْ اَلْفَاتِحَةِ فَاقْرَءُوا: (بِسْمِ اَللَّهِ اَلرَّحْمَنِ اَلرَّحِيمِ) , فَإِنَّهَا إِحْدَى آيَاتِهَا»
The Messenger of Allah (sallallahu alayhi wa sallam) said: “Whenever you recite Surat Al-Fatiha, recite Bismillahir-Rahmanir-Rahim, for it is one of its Ayat (Verses).”.
Bulugh al-Maram 344, Book 2, The Book of Prayer, Hadith 165. 1 min read