Sahih al-Bukhari
Sahih al-Bukhari 1552
Reciting Talbiya when one has mounted his mount and it stood up straight (ready to set out)
Arabic hadith text
حَدَّثَنَا أَبُو عَاصِمٍ، أَخْبَرَنَا ابْنُ جُرَيْجٍ، قَالَ أَخْبَرَنِي صَالِحُ بْنُ كَيْسَانَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَأَهَلَّ النَّبِيُّ صلى الله عليه وسلم حِينَ اسْتَوَتْ بِهِ رَاحِلَتُهُ قَائِمَةً.
Translation
Narrated Ibn `Umar
The Prophet (p.b.u.h) recited Talbiya when he had mounted his Mount and was ready to set out.