حَدَّثَنَا أَبُو الْوَلِيدِ الطَّيَالِسِيُّ، حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ، قَالَ أُمِرْنَا أَنْ نَقْرَأَ، بِفَاتِحَةِ الْكِتَابِ وَمَا تَيَسَّرَ ‏.‏

Abu sa’id said: we were commanded to recite Fatihat al-kitab and whatever was convenient (from the Qur’an during the prayer). Translation Not Available

Book Ref: Sunan Abi Dawud Book 2 Hadith 818
Web Ref:  Sunan Abi Dawud Book 2 Hadith 817