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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bukhari:2844 – Mūsá > Hammām > Isḥāq b. ʿAbdullāh > Anas

The Prophet ﷺ used not to enter any house in Medina except the house of Um Sulaim besides those of his wives when he was asked why, he said, "I take pity on her as her brother was killed in my company. "  

البخاري:٢٨٤٤ – حَدَّثَنَا مُوسَى حَدَّثَنَا هَمَّامٌ عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ عَنْ أَنَسٍ ؓ

أَنَّ النَّبِيَّ ﷺ لَمْ يَكُنْ يَدْخُلُ بَيْتًا بِالْمَدِينَةِ غَيْرَ بَيْتِ أُمِّ سُلَيْمٍ إِلاَّ عَلَى أَزْوَاجِهِ فَقِيلَ لَهُ فَقَالَ: «إِنِّي أَرْحَمُهَا قُتِلَ أَخُوهَا مَعِي۔»  

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Collected by Muslim
muslim:2455 – Ḥasan al-Ḥulwānī > ʿAmr b. ʿĀṣim > Hammām > Isḥāq b. ʿAbdullāh > Anas

I feel great compassion for her. Her brother was killed while he was with me.  

مسلم:٢٤٥٥ – حَدَّثَنَا حَسَنٌ الْحُلْوَانِيُّ حَدَّثَنَا عَمْرُو بْنُ عَاصِمٍ حَدَّثَنَا هَمَّامٌ عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ عَنْ أَنَسٍ قَالَ

كَانَ النَّبِيُّ ﷺ لاَ يَدْخُلُ عَلَى أَحَدٍ مِنَ النِّسَاءِ إِلاَّ عَلَى أَزْوَاجِهِ إِلاَّ أُمِّ سُلَيْمٍ فَإِنَّهُ كَانَ يَدْخُلُ عَلَيْهَا فَقِيلَ لَهُ فِي ذَلِكَ فَقَالَ إِنِّي أَرْحَمُهَا قُتِلَ أَخُوهَا مَعِي