Muhammad bin 'Abdur Rahman محمد بن عبد الرحمن بن نوفل · The Book on Jihad

"The Prophet (ﷺ) sent two armies, place 'Ali bin Abi Talib as the commanded of one of them, and Khalid bin Al-Walid over the other. He said: 'Where there is fighting, then 'Ali (is in command).'" He said: "So 'Ali conquered a fortress and took a slave girl. Khalid wrote a letter and sent me with it to the Prophet (ﷺ), to speak against him for it. So I arrived to the Prophet (ﷺ) to read the letter. The color…