Hadith 10:242
Al-Miswar b. Makhrama said that some nights after her husband’s death Subai’a al-Aslamiya gave birth to a child. Then she went to the Prophet and asked permission to marry. He gave her permission and she married. Bukhari transmitted it.
وَعَنِ الْمِسْوَرِ بْنِ مَخْرَمَةَ: أَنَّ سُبَيْعَةَ الْأَسْلَمِيَّةَ نُفِسَتْ بَعْدَ وَفَاةِ زَوْجِهَا بِلَيَالٍ فَجَاءَتِ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَاسْتَأْذَنَتْهُ أَنْ تَنْكِحَ فأذِنَ لَهَا فنكحت. رَوَاهُ البُخَارِيّ
Original Reference: Mishkat al-Masabih 3328