Sahih al-Bukhari 1176
Sahih al-Bukhari · Book 19: Prayer at Night (Tahajjud) · To offer the Salat-ud-Duha in journey
Narrated `Abdur Rahman bin Abi Laila:
حَدَّثَنَا آدَمُ ، حَدَّثَنَا شُعْبَةُ ، حَدَّثَنَا عَمْرُو بْنُ مُرَّةَ ، قَالَ سَمِعْتُ عَبْدَ الرَّحْمَنِ بْنَ أَبِي لَيْلَى ، يَقُولُ مَا حَدَّثَنَا أَحَدٌ، أَنَّهُ رَأَى النَّبِيَّ صلى الله عليه وسلم يُصَلِّي الضُّحَى غَيْرَ أُمِّ هَانِئٍ فَإِنَّهَا قَالَتْ إِنَّ النَّبِيَّ صلى الله عليه وسلم دَخَلَ بَيْتَهَا يَوْمَ فَتْحِ مَكَّةَ فَاغْتَسَلَ وَصَلَّى ثَمَانِيَ رَكَعَاتٍ فَلَمْ أَرَ صَلاَةً قَطُّ أَخَفَّ مِنْهَا، غَيْرَ أَنَّهُ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ.
Only Um Hani narrated to me that she had seen the Prophet (ﷺ) offering the Duha prayer. She said, "On the day of the conquest of Mecca, the Prophet (ﷺ) entered my house, took a bath and offered eight rak`at (of Duha prayers. I had never seen the Prophet (ﷺ) offering such a light prayer but he performed bowing and prostrations perfectly .