No one has ever narrated to me that he saw the Messenger of Allah ﷺ observing the forenoon prayer, except Umm Hani. She, however, narrated that the Messenger of Allah ﷺ entered her house on the day of the Conquest of Mecca and prayed eight rak'ahs (adding): I never saw a shorter prayer than it except that he performed the bowing and prostration completely. But (one of the narrators) Ibn Bashshar in his narration made no mention of the word:" Never".  

مَا أَخْبَرَنِي أَحَدٌ أَنَّهُ رَأَى النَّبِيَّ ﷺ يُصَلِّي الضُّحَى إِلاَّ أُمُّ هَانِئٍ فَإِنَّهَا حَدَّثَتْ أَنَّ النَّبِيَّ ﷺ دَخَلَ بَيْتَهَا يَوْمَ فَتْحِ مَكَّةَ فَصَلَّى ثَمَانِيَ رَكَعَاتٍ مَا رَأَيْتُهُ صَلَّى صَلاَةً قَطُّ أَخَفَّ مِنْهَا غَيْرَ أَنَّهُ كَانَ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ وَلَمْ يَذْكُرِ ابْنُ بَشَّارٍ فِي حَدِيثِهِ قَوْلَهُ قَطُّ  

"No one informed that they saw Messenger of Allah praying Ad-Duha except Umm Hani. She narrated that Messenger of Allah entered her house on the Day of the Conquest of Makkah. He performed Ghusl and performed eight voluntary Rak'ah such that she had not ever seen him pray any Salat lighter than them, but that he completed the bowing and prostrations."  

أَنَّهُ رَأَى النَّبِيَّ ﷺ يُصَلِّي الضُّحَى إِلاَّ أُمُّ هَانِئٍ فَإِنَّهَا حَدَّثَتْ أَنَّ رَسُولَ اللَّهِ ﷺ دَخَلَ بَيْتَهَا يَوْمَ فَتْحِ مَكَّةَ فَاغْتَسَلَ فَسَبَّحَ ثَمَانَ رَكَعَاتٍ مَا رَأَيْتُهُ صَلَّى صَلاَةً قَطُّ أَخَفَّ مِنْهَا غَيْرَ أَنَّهُ كَانَ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ  

"No one informed that they saw Messenger of Allah praying Ad-Duha except Umm Hani. She narrated that Messenger of Allah entered her house on the Day of the Conquest of Makkah. He performed Ghusl and performed eight voluntary Rak'ah such that she had not ever seen him pray any Salat lighter than them, but that he completed the bowing and prostrations." (Using translation from Tirmidhī 474)   

أَنَّهُ رَأَى النَّبِيَّ ﷺ يُصَلِّي الضُّحَى غَيْرَ أُمِّ هَانِئٍ فَإِنَّهَا حَدَّثَتْ أَنَّ النَّبِيَّ ﷺ دَخَلَ بَيْتَهَا يَوْمَ فَتْحِ مَكَّةَ فَاغْتَسَلَ وَصَلَّى ثَمَانِيَ رَكَعَاتٍ مَا رَأَتْهُ صَلَّى صَلَاةً قَطُّ أَخَفَّ مِنْهَا غَيْرَ أَنَّهُ كَانَ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ  

"عَن يزيد بن أَبى زِيَاد قَالَ: سَأَلْتُ عَبد الرَّحَمن بن الْحرث عَنْ صَلَاة الضحى فقال: أَدرَكْت أَصْحَاب رَسُولِ اللَّهِ ﷺ وَهُمْ مَتَوافِرُونَ، فَمَا حَدَّثنِى أَحَد مِنْهُم أَنَّهُ رَأَى النَّبِىَّ ﷺ يُصَلِّى الضُّحَى غَيْرَ أُمّ هَانئ، فَإِنَّهَا قَالَتْ: دَخَلَ عَلَى رَسُول اللَّهِ ﷺ يَوْمَ الْجُمُعة يَوْمَ الْفَتْح، فَاغْتَسَلَ ثُمَّ صَلَّى ثَمَانِى رَكَعَاتٍ".