Musannaf Ibn Abi Shayba 33:689

Abdullah ibn Numayr narrated to us, he said: Al-A’mash narrated to us, from Ibrahim, from Alqama, who said: Mu’dad was struck by an arrow in his head. He pulled the arrow out of his head, then placed his hand on the spot, and then said: "It is indeed small, and Allah surely puts blessing in the small."