Sahih Al Bukhari Hadith Number 1514

Narrated Ibn `Umar: I saw that Allah’s Messenger (peace be upon him) used to ride on his Mount at Dhul Hulaifa and used to start saying, “Labbaik” when the Mount stood upright.

25  Hajj (Pilgrimage)
Hadith number 1514
Volume no 2
Chapter: 2 (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, …”)