Clarification of the Transmission Chain to Muthanna Ibn Abd Al-Salam

And whatever is narrated from Muthanna ibn Abd Al-Salam, I have narrated it from Muhammad ibn Al-Hasan - may Allah سبحانه وتعالى be pleased with him - from Muhammad ibn Al-Hasan Al-Ṣaffar, from Muawiyah ibn Hakim, from Abdullah ibn Al-Mughirah, from Muthanna ibn Abd Al-Salam.