Clarification of the Transmission Chain to Abdullah Ibn Sinan

Everything in this book that is narrated from Abdullah ibn Sinan has been transmitted by me from my father - may Allah سبحانه وتعالى be pleased with him - from Abdullah ibn Ja'far Al-Himyari, from Ayyub ibn Nuh, from Muhammad ibn Abi 'Umayr, from Abdullah ibn Sinan. He is the one who was mentioned in the presence of Imam Jafar ibn Muhammad Al-Sadiq عليه السلام, and the Imam said: "Indeed, he surpasses old age in goodness."