The prohibition of marriage for one who is in Ihram, and it is disliked for him to propose marriage
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا دَاوُدُ بْنُ عَبْدِ الرَّحْمَنِ، عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ جَابِرِ بْنِ زَيْدٍ أَبِي الشَّعْثَاءِ، عَنِ ابْنِ عَبَّاسٍ، أَنَّهُ قَالَ تَزَوَّجَ رَسُولُ اللَّهِ صلى الله عليه وسلم مَيْمُونَةَ وَهُوَ مُحْرِمٌ .
Ibn 'Abbas (Allah be pleased with them) reported: Allah's Messenger. (ﷺ) married Maimuna while he was a Muhrim.