The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wa'l-Adab)
Muslim :: Book 32 : Hadith 6334
Abd Musa reported that Allah's Messenger (may peace be upon him) said: When any one of you happens to go to a meeting or the bazar with an arrow in his hand he must grasp its pointed head; then (he again said): He must grasp its pointed head. Abu Musa said: By Allah, we did not court death until some of us had flung arrows upon the faces of one another.