Musnad Ahmad 105:1

Sufyan ibn 'Uyaynah narrated to us, from Isma'il ibn Umayyah, from a freed slave of theirs named Muzahim ibn Abi Muzahim, from 'Abd al-'Aziz ibn 'Abd Allah ibn Khalid ibn Usayd, from a man from Khuza'ah called either Mihrash or Mukhrish—Sufyan did not confirm his name—that the Prophet, peace and blessings of Allah be upon him, went out from al-Ji'ranah by night, performed 'Umrah, then returned, and he was there in the morning like one who had spent the night. I looked at his back, and it was as if it were a bar of silver.