(8) باب الإِيمَاءِ عَلَى الدَّابَّةِ
Narrated `Abdullah bin Dinar:
On traveling, `Abdullah bin `Umar used to offer the prayer on his Mount by signs whatever direction it took. `Abdullah said that the Prophet (ﷺ) used to do so.
Reference: Sahih al-Bukhari 1096
In-book reference: Book 18, Hadith 16
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 20, Hadith 201