Narrated AbuSalam: AbuSalam reported on the authority of a man from the companion of the Prophet (ﷺ). He said: We attacked a tribe of Juhaynah. A man from the Muslims pursued a man of them, and struck him but missed him. He struck himself with the sword. The Messenger of Allah (ﷺ) said: Your brother, O group of Muslims. The people hastened towards him, but found him dead. The Messenger of Allah (ﷺ) wrapped him with his clothes and his blood, and offered (funeral) prayer for him and buried him. They said: Messenger of Allah, is he a martyr? He said: Yes, and I am witness to him

English translation · Sunan Abu Dawud