Musnad Ahmad 32:803

Muhammad ibn Ja‘far and Hajjaj narrated to us, they said: Shu‘bah narrated to us, he said: I heard Hisham ibn Zayd ibn Anas ibn Malik say: I entered with my grandfather, Anas ibn Malik, into the house of al-Hakam ibn Ayyub. There, I saw some people who had set up a hen and were shooting at it. Anas said: "The Messenger of Allah, may Allah bless him and grant him peace, forbade that animals be kept for target practice."