Musannaf Ibn Abi Shayba 3:2736

Al-Fadl narrated to us, from Ibn Abi Dhi'b, who said: I saw Ibn Shihab intending to travel on the day of Friday in the forenoon. So I said to him: "Do you travel on the day of Friday?" He said: "Indeed, the Messenger of Allah (peace and blessings of Allah be upon him) traveled on the day of Friday."