´Jabir narrated:` "The Prophet dispatched me for something he needed. I came to him while he was performing Salat on his mount, heading east, he made the prostrations lower than the bowing."
Hadith Referenceسنن ترمذي / كتاب الصلاة / 351
Hadith Gradingالألبانی:صحيح، صحيح أبي داود (1112) دون السجود