Musannaf Ibn Abi Shayba 13:1340

Abu Bakr narrated to us, he said: Hafs narrated to us, from al-Shaybani, from Humayd al-Azraq, from Umar ibn Abd al-Aziz: That he judged in favor of the right of pre-emption (shuf'ah) for the partner after ten years, and its owner had been absent.