Prayer (Kitab Al-Salat)
2/131. Chapter:
Those Who Do Not Say That "Bismilaahir-Rahmanir-Rahim" Should Be Said Aloud
Sunan Abi Dawud
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا هِشَامٌ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم وَأَبَا بَكْرٍ وَعُمَرَ وَعُثْمَانَ كَانُوا يَفْتَتِحُونَ الْقِرَاءَةَ بِـ { الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ } .
‘Anas said: The Prophet(peace be upon hm), Abu Bakr, ‘Umar and ‘Uthman used to begin the recitation with “Praise be to Allah, the Lord of the Universe.”
Reference : Sunan Abi Dawud 782In-book reference : Book 2, Hadith 392English translation : Book 2, Hadith 781