Sunan an-Nasa'i, Hadith 3271 ⓘ
It was narrated that Ibn 'Abbas said: "The Messenger of Allah married Maimunah bint Al-Harith when he was a Muhrim." According to the Hadith of Ya'la (one of the narrators): "In Sarif."
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، عَنْ مُحَمَّدِ بْنِ سَوَاءٍ، قَالَ حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، وَيَعْلَى بْنِ حَكِيمٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ تَزَوَّجَ رَسُولُ اللَّهِ صلى الله عليه وسلم مَيْمُونَةَ بِنْتَ الْحَارِثِ وَهُوَ مُحْرِمٌ وَفِي حَدِيثِ يَعْلَى بِسَرِفَ .
also referenced under: Book 26, Hadith 76 (In-Book) & Volume 4, Book 26, Hadith 3273 (DarusSalam)