It was narrated from Ibn 'Abbas that the Prophet (ﷺ) married Maimunah when he was a Muhrim, and she appointed Al-'Abbas in charge of her marriage, and he married her to him.

أَخْبَرَنَا عُثْمَانُ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنِي إِبْرَاهِيمُ بْنُ الْحَجَّاجِ، قَالَ حَدَّثَنَا وُهَيْبٌ، عَنِ ابْنِ جُرَيْجٍ، عَنْ عَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم نَكَحَ مَيْمُونَةَ وَهُوَ مُحْرِمٌ جَعَلَتْ أَمْرَهَا إِلَى الْعَبَّاسِ فَأَنْكَحَهَا إِيَّاهُ ‏.‏