Clarification of the Transmission Chain to Dawud Al-Sarmi

Everything in this book that is narrated from Dawud Al-Sarmi has been transmitted by me from Muhammad ibn Musa ibn Al-Mutawakkil - may Allah سبحانه وتعالى be pleased with him - from Sa'd ibn Abdullah and Ali ibn Ibrahim ibn Hashim together, from Muhammad ibn 'Isa ibn 'Ubayd, from Dawud Al-Sarmi.