Everything in this book that is narrated from Abd Al-Ala, the freed servant of Al-Sam, has been transmitted by me from Muhammad ibn Al-Hasan - may Allah سبحانه وتعالى be pleased with him - from Al-Hasan ibn Matil, from Muhammad ibn Al-Husayn ibn Abi Al-Khattab, from Jafar ibn Bashir, from Khalid ibn Abi Ismail, from Abd Al-Ala, the freed servant of Al-Sam.