Abdullah b. 'Umar reported on the authority of his father (Allah be pleased with them):We were along with Allah's Messenger (way peace he upon him) in the morning of 'Arafa (9th of Dhu'l-Hijja). Some of us pronounced Takbir and some of us Tahlil La ilaha ill-Allah). And to those of us who pronounced Takbir, I said: By Allah, how strange it is that you did not care to ask him: What did you see Allah's Messenger (ﷺ) doing (on this occasion)?
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، وَهَارُونُ بْنُ عَبْدِ اللَّهِ، وَيَعْقُوبُ الدَّوْرَقِيُّ، قَالُوا أَخْبَرَنَا يَزِيدُ بْنُ هَارُونَ، أَخْبَرَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي سَلَمَةَ، عَنْ عُمَرَ بْنِ حُسَيْنٍ، عَنْ عَبْدِ اللَّهِ بْنِ، أَبِي سَلَمَةَ عَنْ عَبْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ أَبِيهِ، قَالَ كُنَّا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي غَدَاةِ عَرَفَةَ فَمِنَّا الْمُكَبِّرُ وَمِنَّا الْمُهَلِّلُ فَأَمَّا نَحْنُ فَنُكَبِّرُ قَالَ قُلْتُ وَاللَّهِ لَعَجَبًا مِنْكُمْ كَيْفَ لَمْ تَقُولُوا لَهُ مَاذَا رَأَيْتَ رَسُولَ اللَّهِ صلى الله عليه وسلم يَصْنَعُ.
Muslim
The Book of Pilgrimage • Hadith 301