Everything in this book that is narrated from Hakam ibn Hakim, the nephew of Khallad, has been transmitted by me from my father and from Muhammad ibn Al-Hasan - may Allah (swt) be pleased with them both - from Sa'd ibn Abdullah and Abdullah ibn Ja'far Al-Himyari, from Ahmad ibn Abi Abdullah Al-Barqi, from his father, from Muhammad ibn Abi 'Umayr, from Hakam ibn Hakim.