No one told us that the Prophet ﷺ had offered Duha prayer except Umm Hani. She said that the Prophet ﷺ 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.
أَنَّهُ رَأَى النَّبِيَّ ﷺ صَلَّى الضُّحَى غَيْرَ أُمِّ هَانِئٍ فَإِنَّهَا ذَكَرَتْ أَنَّ النَّبِيَّ ﷺ يَوْمَ فَتْحِ مَكَّةَ اغْتَسَلَ فِي بَيْتِهَا وَصَلَّى ثَمَانِيَ رَكَعَاتٍ فَلَمْ يَرَهُ أَحَدٌ صَلاَّهُنَّ بَعْدُ