Clarification of the Transmission Chain to Hakam Ibn Hakim, the Nephew of Khallad

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 سبحانه وتعالى 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.