Sunan an-Nasa'i, Hadith 2760 ⓘ
It was narrated that 'Ubaid bin Jraij said: "I said to Ibn 'Umar: 'I saw you begin the Talbiyah when your she-camel stood up with you. He said: "The Messenger of Allah used to begin the Talbiyah when his she-camel stood up with him."
أَخْبَرَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، قَالَ أَنْبَأَنَا ابْنُ إِدْرِيسَ، عَنْ عُبَيْدِ اللَّهِ، وَابْنِ، جُرَيْجٍ وَابْنِ إِسْحَاقَ وَمَالِكِ بْنِ أَنَسٍ عَنِ الْمَقْبُرِيِّ، عَنْ عُبَيْدِ بْنِ جُرَيْجٍ، قَالَ قُلْتُ لاِبْنِ عُمَرَ رَأَيْتُكَ تُهِلُّ إِذَا اسْتَوَتْ بِكَ نَاقَتُكَ . قَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُهِلُّ إِذَا اسْتَوَتْ بِهِ نَاقَتُهُ وَانْبَعَثَتْ .
also referenced under: Book 24, Hadith 0 (In-Book) & Volume 3, Book 24, Hadith 2761 (DarusSalam)