Yahya related to me from Malik, from Nafi, from Nubayh ibn Wahb, who was from the tribe of Bani Abd ad-Dar, that Umar ibn Ubaydullah sent a message to Aban ibn Uthman (who was amir of the hajj at the time), while both of them were in ihram, saying, "I want to marry Bint Shayba ibn Jubayr to Talha ibn Umar and I want you to be present." Aban told him that he should not do that and said, "I heard Uthman ibn Affan say that the Messenger of Allah ﷺ said, 'A man in ihram should not marry, or give in marriage, or get betrothed.' "

أَنَّ عُمَرَ بْنَ عُبَيْدِ اللَّهِ أَرْسَلَ إِلَى أَبَانَ بْنِ عُثْمَانَ وَأَبَانُ يَوْمَئِذٍ أَمِيرُ الْحَاجِّ وَهُمَا مُحْرِمَانِ إِنِّي قَدْ أَرَدْتُ أَنْ أُنْكِحَ طَلْحَةَ بْنَ عُمَرَ بِنْتَ شَيْبَةَ بْنِ جُبَيْرٍ وَأَرَدْتُ أَنْ تَحْضُرَ فَأَنْكَرَ ذَلِكَ عَلَيْهِ أَبَانُ وَقَالَ سَمِعْتُ عُثْمَانَ بْنَ عَفَّانَ يَقُولُ قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَنْكِحِ الْمُحْرِمُ وَلاَ يُنْكِحْ وَلاَ يَخْطُبْ

Nubaih bin Wahb brother of Banu Abd Al Dar said ‘Umar bin Ubaid Allah sent someone to Aban bin Uthman bin Affan asking him (to participate in the marriage ceremony). Aban in those days was the chief of the pilgrims and both were in the sacred state (wearing ihram). I want to give the daughter of Shaibah bin Jubair to Talhah bin Umar in marriage. I wish that you may attend it. Aban refused and said I heard my father ‘Uthman bin Affan narrating a tradition from the Apostle of Allaah ﷺ as saying A pilgrim may not marry and give someone in marriage in the sacred state(while wearing ihram). (Using translation from Abū Dāʾūd 1841)

قَالَ رَسُولُ اللهِ ﷺ «لَا يَنْكِحُ الْمُحْرِمُ وَلَا يُنْكَحُ وَلَا يَخْطُبُ»