Clarification of the Transmission Chain to Umar Ibn Hanzalah

Everything in this book that is narrated from Umar ibn Hanzalah has been transmitted by me from Al-Husayn ibn Ahmad ibn Idris - may Allah (swt) be pleased with him - from his father, from Muhammad ibn Ahmad ibn Yahya, from Muhammad ibn Isa, from Safwan ibn Yahya, from Dawud ibn Al-Husayn, from Umar ibn Hanzalah.