Musannaf Ibn Abi Shayba 13:2363

Abu Bakr narrated to us, he said: Al-Fadl ibn Dukayn narrated to us, from Abu Ja’far, from Al-Rabi’, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) forbade looting (al-nuhba). And he said: "Whoever loots is not one of us."