(Imām Bukhārī narrates): Abu Nu'aim narrated to us, he said: Ibn Uyainah narrated to us from Ishaq from Anas, may Allāh be pleased with him, he said that
the Prophet ﷺ prayed in the house of Umm Sulaim, may Allāh be pleased with her, then the orphan and I stood behind him for the prayer, and Umm Sulaim stood behind us.
حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا ابْنُ عُيَيْنَةَ، عَنْ إِسْحَاقَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ صَلَّى النَّبِيُّ صلى الله عليه وسلم فِي بَيْتِ أُمِّ سُلَيْمٍ، فَقُمْتُ وَيَتِيمٌ خَلْفَهُ، وَأُمُّ سُلَيْمٍ خَلْفَنَا.
Reference: Sahih Al Bukhari 871