Clarification of the Transmission Chain to Khalid Ibn Abi Al-ala' Al-Khuffaf

And whatever is narrated from Khalid ibn Abi Al-Ala' Al-Khuffaf, I have narrated it from Muhammad ibn Al-Hasan - may Allah سبحانه وتعالى be pleased with him - from Muhammad ibn Al-Hasan Al-Saffar, from Ya'qub ibn Yazid, from Muhammad ibn Abi Umayr, from Khalid ibn Abi Al-Ala' Al-Khuffaf.