Mujahid bin Jabir مجاهد بن جبر · The Chapters on Jihad

It was narrated from Ibn ‘Abbas that the flag of the Messenger of Allah (ﷺ) was black, and his standard was white.

“It is as if I can see the Messenger of Allah (ﷺ), wearing a black turban, with its two ends hanging between his shoulders.”

“I asked the Messenger of Allah (ﷺ) about the food of the Christians and he said: ‘Do not have any doubt about food, (thereby) following the way of the Christians in that.’”