Musannaf Ibn Abi Shayba 1:1506

Ibn ‘Ulayyah narrated to us, from Ibn ‘Awf al-A‘rābī, who said: A sheikh narrated to us in the gathering of the elders before the Battle of Ibn al-Ash‘ath, and he used to relate stories to us. He said: It reached me that the companions of the Messenger of Allah, may Allah bless him and grant him peace, were on a journey of theirs, and they arrived at a pond in a part of which was a carcass. So they refrained from it until the Messenger of Allah, may Allah bless him and grant him peace, came to them. They said: "O Messenger of Allah, this carcass is in its side." He said: "Give drink and take water, for the water is permissible and does not become forbidden."