Musannaf Ibn Abi Shayba 3:2601

Abu Bakr narrated to us, he said: Waki’ narrated to us, from ‘Abd al-Hamid ibn Ja’far, from his father, from Tamim ibn Mahmud, from ‘Abd al-Rahman ibn Shibl, who said: The Messenger of Allah (may Allah bless him and grant him peace) forbade that a man should designate a place to pray in, just as a camel designates a place.