صَحِيحُ مُسْلِمٍ
Sahih Muslim 1187 c
The Book of Pilgrimage
Clarifying that it is better to enter Ihram when a person's mount sets off with him, heading towards Makkah, not straight after the two rak'ah
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَلِيُّ بْنُ مُسْهِرٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، - رضى الله عنهما - قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا وَضَعَ رِجْلَهُ فِي الْغَرْزِ وَانْبَعَثَتْ بِهِ رَاحِلَتُهُ قَائِمَةً أَهَلَّ مِنْ ذِي الْحُلَيْفَةِ .
Ibn 'Umar (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) pronounced Talbiya in Dhu'l-Hulaifa as he put his feet in the stirrup and his camel stood up and proceeded.
Sahih Muslim, 1187 cSahihصحيح