(Imām Bukhārī narrates): Hafs bin Umar narrated the hadith to us, he says: Shu'bah narrated the hadith to us, from Amr, from Ibn Abi Laila, he narrated that
no one informed us that he saw the Prophet ﷺ offering the prayer of Chasht, except Hazrat Umm Hani (Allāh be pleased with her); she narrated that the Prophet ﷺ performed ghusl in her house on the day of the conquest of Makkah, then offered eight rak'ahs, so I never saw him ﷺ offer a prayer lighter than this, however he ﷺ used to complete the ruku and sujud.
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَمْرِو بْنِ مُرَّةَ، عَنِ ابْنِ أَبِي لَيْلَى، قَالَ
مَا أَخْبَرَنَا أَحَدٌ، أَنَّهُ رَأَى النَّبِيَّ صَلَّى اللهُ عَلَيْهِ وَسلَّمَ صَلَّى الضُّحَى غَيْرُ أُمِّ هَانِئٍ ذَكَرت أَنَّ النَّبِيَّ صَلَّى اللهُ عَلَيْهِ وَسَلّمَ يَوْمَ فَتْحِ مَكَّةَ اغْتَسَلَ فِي بَيْتِهَا، فَصلَّى ثَمَانِيَ رَكَعَاتٍ، فَمَا رَأَيْتُهُ صَلّى صَلاَةً أَخَفَّ مِنْهَا غَيْرَ أَنَّهُ يُتم الرُّكوعَ وَالسُّجُودَ
Reference: Sahih Al Bukhari 1103