Sunan Abi Dawud, Hadith 1286 ⓘ
Narrated Ibn Abi Laila: No one told us that the Prophet had offered Duha prayer except Umm Hani. She said that the Prophet had taken bath in her house on the day of the Conquest of Mecca and prayed eight rak'ahs. But no one saw him afterwards praying these rak'ahs.
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنْ عَمْرِو بْنِ مُرَّةَ، عَنِ ابْنِ أَبِي لَيْلَى، قَالَ مَا أَخْبَرَنَا أَحَدٌ، أَنَّهُ رَأَى النَّبِيَّ صلى الله عليه وسلم صَلَّى الضُّحَى غَيْرَ أُمِّ هَانِئٍ فَإِنَّهَا ذَكَرَتْ أَنَّ النَّبِيَّ صلى الله عليه وسلم يَوْمَ فَتْحِ مَكَّةَ اغْتَسَلَ فِي بَيْتِهَا وَصَلَّى ثَمَانِيَ رَكَعَاتٍ فَلَمْ يَرَهُ أَحَدٌ صَلاَّهُنَّ بَعْدُ .
also referenced under: Hadith 1291 (DarusSalam) & Book 4, Hadith 1286 (USC-MSA)