Clarification of the Transmission Chain to Umar Ibn Udhaynah

Everything in this book that is narrated from Umar ibn Udhaynah has been transmitted by me from my father - may Allah (swt) be pleased with him - from Sa'd ibn Abdullah, from Ahmad ibn Muhammad ibn 'Isa, from Al-Husayn ibn Sa'id, from Muhammad ibn Abi 'Umayr, from Umar ibn Udhaynah.