Bulugh al-Maram 733
'Uthman bin ’Affan (RAA) narrated that the Messenger of Allah (ﷺ) said:
“A Muhrim (one in the state of Ihram) must not contract marriage, nor help others contract marriage, nor get engaged to marry." Related by Muslim.
وَعَنْ عُثْمَانَ بْنِ عَفَّانَ ‏- رضى الله عنه ‏- أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-قَالَ: { لَا يَنْكِحُ اَلْمُحْرِمُ, وَلَا يُنْكِحُ, وَلَا يَخْطُبُ }  رَوَاهُ مُسْلِمٌ  1‏ .‏‏1 ‏- صحيح.‏ رواه مسلم ( 1409 )‏.‏