Sunan an-Nasa'i 902

Arabic

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 ‏{‏ الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ ‏}‏

Translation

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

Reference