This hadeeth comes under the following chapter: THE PERSECUTION OF THE HOLY PROPHET (SALLALLAAHU ALAYHI WA SALLAM) AT THE HANDS OF THE INFIDELS AND HYPOCRITES
It has been narrated on the authority of Jundub b. Sufyan who said: A finger of the Messenger of Allaah (sallAllaahu alayhi wa sallam) was wounded in one of the encounters He said: Thou art just a little finger which has bled, and what thou hast experienced is in the cause of Allaah.