Musnad Ahmad 1018:88

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, Abu Bishr narrated to us, he said: I heard Hassan ibn Bilal narrating from a man from Aslam, one of the companions of the Prophet, may God bless him and grant him peace, that they used to pray the Maghrib prayer with the Prophet, may God bless him and grant him peace. Then they would return to their families at the furthest part of Medina, and they would shoot arrows, seeing where their arrows landed.