Sunan an-Nasa'i #3512 · The Book of Divorce

Sunan an-Nasa'iIt was narrated from Sulaiman bin Yasir that Abu Hurairah
Sunan an-Nasa'i · Book 27 · The Book of Divorce
Sunan an-Nasa'i · كتاب 27 · كتاب الطلاق
"She should observe 'Iddah for the longer of the two periods." Abu Salamah said: "No, it becomes permissible for her to marry when she has given birth." Abu Hurairah said: "I agree with my brother's son." So they sent word to Umm Salamah, the wife of the Prophet, and she said: "Subai'ah Al-Aslamiyyah gave birth shortly after her husband died; she consulted the Messenger of Allah and he told her to get married
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ يَحْيَى، عَنْ سُلَيْمَانَ بْنِ يَسَارٍ، أَنَّ أَبَا هُرَيْرَةَ، وَابْنَ، عَبَّاسٍ وَأَبَا سَلَمَةَ بْنَ عَبْدِ الرَّحْمَنِ تَذَاكَرُوا عِدَّةَ الْمُتَوَفَّى عَنْهَا زَوْجُهَا تَضَعُ عِنْدَ وَفَاةِ زَوْجِهَا فَقَالَ ابْنُ عَبَّاسٍ تَعْتَدُّ آخِرَ الأَجَلَيْنِ ‏.‏ وَقَالَ أَبُو سَلَمَةَ بَلْ تَحِلُّ حِينَ تَضَعُ ‏.‏ فَقَالَ أَبُو هُرَيْرَةَ أَنَا مَعَ ابْنِ أَخِي ‏.‏ فَأَرْسَلُوا إِلَى أُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم فَقَالَتْ وَضَعَتْ سُبَيْعَةُ الأَسْلَمِيَّةُ بَعْدَ وَفَاةِ زَوْجِهَا بِيَسِيرٍ فَاسْتَفْتَتْ رَسُولَ اللَّهِ صلى الله عليه وسلم فَأَمَرَهَا أَنْ تَتَزَوَّجَ ‏.‏
Reference : Sunan an-Nasa'i 3512In-book reference : Book 27, Hadith 124