Muwatta Malik #806
Hajj
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ نُبَيْهِ بْنِ وَهْبٍ، أَخِي بَنِي عَبْدِ الدَّارِ 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 صلى الله عليه وسلم
" لاَ يَنْكِحِ الْمُحْرِمُ وَلاَ يُنْكِحْ وَلاَ يَخْطُبْ " .
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, may Allah bless him and grant
him peace, said, 'A man in ihram should not marry, or give in
marriage, or get betrothed.' "
About Muwatta Malik
This hadith is #806 from Muwatta Malik, in the Book of Hajj.