Clarification of the Transmission Chain to Abdullah Ibn Abi ya'fur

Everything in this book that is narrated from Abdullah ibn Abi Ya'fur has been transmitted by me from Ahmad ibn Muhammad ibn Yahya Al-Attar - may Allah (swt) be pleased with him - from Sa'd ibn Abdullah, from Ahmad ibn Abi Abdullah Al-Barqi, from his father, from Muhammad ibn Abi Umayr, from Hammad ibn Uthman, from Abdullah ibn Abi Ya'fur.