Everything in this book that is narrated from Isa ibn Abi Mansur has been transmitted by me from Muhammad ibn Al-Hasan - may Allah سبحانه وتعالى be pleased with him - from Muhammad ibn Al-Hasan Al-Saffar, from Muhammad ibn Al-Husayn ibn Abi Al-Khattab, from Jafar ibn Bashir, from Hammad ibn Uthman, from Isa ibn Abi Mansur, whose kunya was Abu Salih. He was a Kufan and a freed servant (mawla). We were also narrated by Muhammad ibn Al-Hasan - may Allah سبحانه وتعالى be pleased with him - from Muhammad ibn Al-Hasan Al-Saffar, from Yaqub ibn Yazid, from Ibn Abi Umayr, from Ibrahim ibn Abd Al-Hamid, from Abdullah ibn Sinan, from Ibn Abi Yafur, who said: I was with Abu Abdullah عليه السلام when Isa ibn Abi Mansur approached, and he (the Imam) said to me: "If you want to see the best in this world and the best in the hereafter, then look at him."