Sunan an-Nasa'i
Book 11: The Book of the Commencement of the Prayer
كتاب الافتتاح
153 hadith in this book
It was narrated from Anas that: The Prophet (ﷺ), Abu Bakr, and Umar, may Allah be pleased with them both, would start their recitation with: "All the praise and thanks be to Allah, the Lord of all that exists.
أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم وَأَبُو بَكْرٍ وَعُمَرُ - رضى الله عنهما - يَسْتَفْتِحُونَ الْقِرَاءَةَ بِـ [quran sura="1" aya_start="2" aya_end="2"]{ الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ }
It was narrated from Anas: "I prayed with the Prophet (ﷺ) and with Abu Bakr and Umar, may Allah be pleased with them both, and they started with "All the praise and thanks be to Allah, the Lord of all that exists."
أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ الزُّهْرِيُّ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ أَيُّوبَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ صَلَّيْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم وَمَعَ أَبِي بَكْرٍ وَعُمَرَ - رضى الله عنهما - فَافْتَتَحُوا بِـ [quran sura="1" aya_start="2" aya_end="2"]{ الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ }
Hadith text, translations and grading are courtesy of Sunnah.com.