Clarification of the Transmission Chain to Hammad Ibn Uthman

Everything in this book that is narrated from Hammad ibn Uthman has been transmitted by me from my father - may Allah (swt) be pleased with him - from Sa'd ibn Abdullah and Al-Himyari together, from Ya'qub ibn Yazid, from Muhammad ibn Abi 'Umayr, from Hammad ibn Uthman.