Sahih Bukhari Volume 7, Book 68, Hadith 5321

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

Narrated By 'Abaidullah bin 'Abdullah : That his father had written to Ibn Al-Arqam a letter asking him to ask Subai'a Al-Aslamiya how the Prophet had given her the verdict. She said, "The Prophet, gave me his verdict that after I gave birth, I could marry."