Hadithcore
Sahih al-Bukhari, 5319
sahih

Narrated `Abdullah bin `Abdullah:

that his father had written to Ibn Al-Arqam a letter asking him to ask Subai'a Al-Aslamiya how the Prophet (ﷺ) had given her the verdict. She said, "The Prophet, gave me his verdict that after I gave birth, I could marry."

حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، عَنِ اللَّيْثِ، عَنْ يَزِيدَ، أَنَّ ابْنَ شِهَابٍ، كَتَبَ إِلَيْهِ أَنَّ عُبَيْدَ اللَّهِ بْنَ عَبْدِ اللَّهِ، أَخْبَرَهُ عَنْ أَبِيهِ، أَنَّهُ كَتَبَ إِلَى ابْنِ الأَرْقَمِ أَنْ يَسْأَلَ، سُبَيْعَةَ الأَسْلَمِيَّةَ كَيْفَ أَفْتَاهَا النَّبِيُّ صلى الله عليه وسلم فَقَالَتْ أَفْتَانِي إِذَا وَضَعْتُ أَنْ أَنْكِحَ‏.‏

References2 variants
In-Book Reference
Book 68, Hadith 68
USC-MSA web (English) reference
Vol. 7, Book 63, Hadith 240 (deprecated numbering scheme)