Clarification of the Transmission Chain to mu'awiyah Ibn Shurayh

Everything in this book that is narrated from Mu'awiyah ibn Shurayh has been transmitted by me from my father - may Allah سبحانه وتعالى be pleased with him - from Sa'd ibn Abdullah, from Ahmad ibn Muhammad ibn 'Isa, from 'Uthman ibn 'Isa, from Mu'awiyah ibn Shurayh.