Hadith
أَخْبَرَنِي عِمْرَانُ بْنُ يَزِيدَ، قَالَ حَدَّثَنَا عِيسَى، - وَهُوَ ابْنُ يُونُسَ - قَالَ حَدَّثَنَا الأَعْمَشُ، عَنْ مُسْلِمٍ الْبَطِينِ، عَنْ عَلِيِّ بْنِ حُسَيْنٍ، عَنْ مَرْوَانَ بْنِ الْحَكَمِ، قَالَ كُنْتُ جَالِسًا عِنْدَ عُثْمَانَ فَسَمِعَ عَلِيًّا، يُلَبِّي بِعُمْرَةٍ وَحَجَّةٍ فَقَالَ أَلَمْ تَكُنْ تُنْهَى عَنْ هَذَا قَالَ بَلَى وَلَكِنِّي سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يُلَبِّي بِهِمَا جَمِيعًا فَلَمْ أَدَعْ قَوْلَ رَسُولِ اللَّهِ صلى الله عليه وسلم لِقَوْلِكَ .
It was narrated that Marwan bin Al-Hakam said:"I was sitting with 'Uthan and he heard 'Ali reciting the Talbiyah for "Umrah and Hajj (together). He said 'Were you not forbidden to do this?' He said: 'Yes, but I heard the Messenger of "Allah reciting the Talbiyah for them together, and I will not igore what the Messenger of Allah said in favor of what you say
Sahih · Abu Ghuddah
Sunan an-Nasa'i 2722 ·Book 24, Hadith 104·Also available on sunnah.com·