Musannaf Ibn Abi Shaybah

Hazrat Muhammad bin Ja'far bin Zubair narrates that the Messenger of Allah (peace and blessings be upon him) sent Hazrat Abdullah bin Unais to Khalid bin Sufyan. He says that when I reached him, it was the time of Asr (afternoon prayer). I feared that I would have to make some effort to reach him, so I performed the prayer while walking.