Musannaf Ibn Abi Shaybah 8585 — A man who prays while walking

Muhammad bin Ja'far bin al-Zubayr said: The Messenger of Allah (peace and blessings be upon him) sent Sayyiduna Abdullah bin Unays (may Allah be pleased with him) to Khalid bin Sufyan. He said: When I drew near to him, it was the time of Asr. I feared that I would have to make some effort to reach him, so I prayed while walking.