158 – al-ʿAbbās ibn ʿAbd al-ʿAẓīm narrated to us; he said: I heard Abū al-Walīd relate—from ʿUbayd ibn …—who said: I asked Sufyān ibn ʿUyaynah, “Who is the most scrupulous person you have ever seen?” He replied, “ʿUthmān ibn Zāʾidah.”