Everything in this book that is narrated from Hafs ibn Salim has been transmitted by me from my father - may Allah سبحانه وتعالى be pleased with him - from Sa'd ibn Abdullah, from Muhammad ibn Al-Husayn ibn Abi Al-Khattab, from Ja'far ibn Bashir, from Hammad ibn 'Uthman, from Hafs Abu Wallad ibn Salim Al-Kufi, who was a freed servant (mawla).