Narrated Salim bin `Abdullah: Ibn `Umar said, "Allah's Apostle used to pray the Nawafil on the back of his Mount (carriage) by signs facing any direction." Ibn `Umar used to do the same.
Hadith ReferenceSahih Bukhari / The Book of Abridged Or Shortened Prayers (At-Taqsir) / Hadith: 1105
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة