Muwatta Imam Malik Book of Hajj, Hadith 32

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to pray in the mosque of Dhu'l-Hulayfa, and then go outside and get on his camel and when his camel had stood up he would begin to do talbiya.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يُصَلِّي فِي مَسْجِدِ ذِي الْحُلَيْفَةِ