Musannaf Ibn Abi Shayba 35:6

Ibn Idris narrated to us, from al-A’mash, from ‘Abdullah ibn ‘Abdullah, from ‘Abd al-Rahman ibn Abi Layla, from al-Bara’ ibn Malik, who said: A man came to the Prophet, may Allah bless him and grant him peace, and said: "Shall I pray in the sheepfolds?" He said: "Yes." He said: "Shall I perform ablution from their meat?" He said: "No." He said: "Shall I pray in the resting places of the camels?" He said: "No." He said: "Shall I perform ablution from their meat?" He said: "Yes."