Sahih al-Bukhari 463
Sahih al-Bukhari · Book 8: Prayers (Salat) · To pitch a tent in the mosque for patients, etc
Narrated `Aisha:
حَدَّثَنَا زَكَرِيَّاءُ بْنُ يَحْيَى ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ ، قَالَ حَدَّثَنَا هِشَامٌ ، عَنْ أَبِيهِ ، عَنْ عَائِشَةَ ، قَالَتْ أُصِيبَ سَعْدٌ يَوْمَ الْخَنْدَقِ فِي الأَكْحَلِ، فَضَرَبَ النَّبِيُّ صلى الله عليه وسلم خَيْمَةً فِي الْمَسْجِدِ لِيَعُودَهُ مِنْ قَرِيبٍ، فَلَمْ يَرُعْهُمْ ـ وَفِي الْمَسْجِدِ خَيْمَةٌ مِنْ بَنِي غِفَارٍ ـ إِلاَّ الدَّمُ يَسِيلُ إِلَيْهِمْ فَقَالُوا يَا أَهْلَ الْخَيْمَةِ، مَا هَذَا الَّذِي يَأْتِينَا مِنْ قِبَلِكُمْ فَإِذَا سَعْدٌ يَغْذُو جُرْحُهُ دَمًا، فَمَاتَ فِيهَا.
On the day of Al-Khandaq (battle of the Trench' the medial arm vein of Sa`d bin Mu`ad [??] was injured and the Prophet (ﷺ) pitched a tent in the mosque to look after him. There was another tent for Banu Ghaffar in the mosque and the blood started flowing from Sa`d's tent to the tent of Bani Ghaffar. They shouted, "O occupants of the tent! What is coming from you to us?" They found that Sa`d' wound was bleeding profusely and Sa`d died in his tent.