Clarification of the Transmission Chain to Abdullah Ibn Sulayman

Everything in this book that is narrated from Abdullah ibn Sulayman has been transmitted by me 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 Safwan ibn Yahya and Muhammad ibn Abi 'Umayr together, from Abdullah ibn Sulayman.