Matraf bin 'Abdullah bin al-Shakhayr مطرف بن عبد الله بن الشخير · The Chapters on Jihad

“I heard the Messenger of Allah (ﷺ) reciting on the pulpit: ‘And make ready against them all you can of power.’ (And saying that) three times – ‘Power means shooting.”

“This is Abu Dharr,” so he (the slave) started to move back. But Abu Dharr said: “My close friend (i.e., the Prophet (ﷺ)) told me to listen and obey, even if (the leader was) an Ethiopian slave with amputated limbs.”