Musannaf Ibn Abi Shayba 28:485

Waki' narrated to us, he said: Mus'ab bin Sulaym narrated to us, he said: I heard Anas bin Malik saying: Indeed, Abu Musa wanted to employ Al-Bara' bin Malik, so he came to him. Al-Bara' bin Malik said to him: "Give me my sword, my bow, and my spear."