Sunan an-Nasa'i, hadith 1976

أَخْبَرَنَا حُمَيْدُ بْنُ مَسْعَدَةَ، عَنْ عَبْدِ الْوَارِثِ، قَالَ حَدَّثَنَا حُسَيْنٌ، عَنِ ابْنِ بُرَيْدَةَ، عَنْ سَمُرَةَ، قَالَ صَلَّيْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم عَلَى أُمِّ كَعْبٍ مَاتَتْ فِي نِفَاسِهَا فَقَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي الصَّلاَةِ فِي وَسَطِهَا ‏.‏

It was narrated that Samurah said:"I offered the funeral prayer with the Messenger of Allah for Umm kab who had died in childbirth, and the Messenger of Allah stood in line at her mid-section to pray