Everything in this book that is narrated from Muhammad ibn Humran has been transmitted by me from my father - may Allah سبحانه وتعالى be pleased with him - from Ali ibn Ibrahim, from his father, from Muhammad ibn Abi Umayr, from Muhammad ibn Humran. I have also narrated it from Muhammad ibn Al-Hasan - may Allah سبحانه وتعالى have mercy on him - from Muhammad ibn Al-Hasan Al-Saffar, from Ayyub ibn Nuh and Ibrahim ibn Hashim together, from Safwan ibn Yahya and Ibn Abi Umayr together, from Muhammad ibn Humran.