Language:
كتاب الحج
25  
Hajj (Pilgrimage)
(2)
Chapter: The Statement of Allah Most High: "Call ˹all˺ people to the pilgrimage.1 They will come to you on foot and on every lean camel from every distant path, so they may obtain the benefits ˹in store˺ for them, ..."
(2)
بَابُ قَوْلِ اللَّهِ تَعَالَى: {يَأْتُوكَ رِجَالاً وَعَلَى كُلِّ ضَامِرٍ يَأْتِينَ مِنْ كُلِّ فَجٍّ عَمِيقٍ لِيَشْهَدُوا مَنَافِعَ لَهُمْ}
Sahih al-Bukhari 1514

Narrated Ibn `Umar:

I saw that Allah's Messenger (ﷺ) used to ride on his Mount at Dhul Hulaifa and used to start saying, "Labbaik" when the Mount stood upright.

حَدَّثَنَا أَحْمَدُ بْنُ عِيسَى، حَدَّثَنَا ابْنُ وَهْبٍ، عَنْ يُونُسَ، عَنِ ابْنِ شِهَابٍ، أَنَّ سَالِمَ بْنَ عَبْدِ اللَّهِ، أَخْبَرَهُ أَنَّ ابْنَ عُمَرَ ـ رضى الله عنهما ـ قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَرْكَبُ رَاحِلَتَهُ بِذِي الْحُلَيْفَةِ ثُمَّ يُهِلُّ حَتَّى تَسْتَوِيَ بِهِ قَائِمَةً‏.‏
Reference : Sahih al-Bukhari 1514
In-book reference : Book 25, Hadith 2
USC-MSA web (English) reference : Vol. 2, Book 26, Hadith 590
  (deprecated numbering scheme)