Sayyiduna Anas bin Malik (may Allah be pleased with him) says that when the Prophet (peace and blessings be upon him) prayed Fajr while on a journey, he would walk. Others have added to it: a little, while his she-camel was led by its nose-rein.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10338
Hadith Gradingمحدثین:حسن
Hadith Takhrij«حسن۔ اخرجه ابو نعيم في الجلية 8/ 180»