مُوَطَّأُ مَالِكٍ
Muwatta Malik 754
Hajj
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّ عُمَرَ بْنَ عَبْدِ الْعَزِيزِ، غَدَا يَوْمَ عَرَفَةَ مِنْ مِنًى فَسَمِعَ التَّكْبِيرَ عَالِيًا فَبَعَثَ الْحَرَسَ يَصِيحُونَ فِي النَّاسِ أَيُّهَا النَّاسُ إِنَّهَا التَّلْبِيَةُ .
Yahya related to me from Malik, from Yahya ibn Said, that Umar ibn Abd alAziz was once going from Mina (to Arafa) on the day of Arafa and heard the takbir being said loudly, so he sent the guard to shout out to the people, "O people, you should be saying the talbiya."
Arabic/English book reference: Book 20, Hadith 49