Musannaf Ibn Abi Shayba 3:5823

Waki’ narrated to us, he said: Mis’ar and Sufyan narrated to us, from Habib ibn Abi Thabit, from Abd al-Rahman ibn Miswar, he said: We stayed with Sa’d ibn Malik for two months. Sufyan said: In ‘Uman. And Mis’ar said: In ‘Uman or in Nu’man. He would shorten the prayer while we would perform it in full. So we said to him [about that], and he said: We are more knowledgeable.