وَزَادَ ابْنُ إِسْحَاقَ حَدَّثَنِي ابْنُ أَبِي نَجِيحٍ، وَأَبَانُ بْنُ صَالِحٍ، عَنْ عَطَاءٍ، وَمُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ تَزَوَّجَ النَّبِيُّ صلى الله عليه وسلم مَيْمُونَةَ فِي عُمْرَةِ الْقَضَاءِ‏.‏

Ibn `Abbas added: The Prophet married Maimuna during the `Umrat-al-Qada' (i.e. the `Umra performed in lieu of the `Umra which the Prophet (PBUH) could not perform because the pagans, prevented him to perform that `Umra). Translation Not Available

Book Ref: Sahih Bukhari Book 64 Hadith 4259
Web Ref:  Sahih Bukhari Vol 5 Book 59 Hadith 559