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 used to do so.
Hadith ReferenceSahih Bukhari / The Book of Abridged Or Shortened Prayers (At-Taqsir) / Hadith: 1096
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة