Mishkat al-Masabih 10 The Rites of Pilgrimage كتاب المناسك 185

قَالَ: تَزَوَّجَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَيْمُونَةَ وَهُوَ حَلَالٌ وَبَنَى بِهَا وَهُوَ حَلَالٌ وَكُنْتُ أَنَا الرَّسُولَ بَيْنَهُمَا. رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ حَسَنٌ

Abu Rafi‘ said: God’s messenger married Maimuna when he was not in the sacred state and cohabited with her when he was not in the sacred state, and I was the messenger between them. Ahmad and Tirmidhi transmitted it, the latter saying that this is a hasan tradition.