Everything in this book that is narrated from Mamar ibn Khallad has been transmitted by me from Muhammad ibn Musa ibn Al-Mutawakkil, Muhammad ibn Ali Majilawayh, and Ahmad ibn Ziyad ibn Jafar Al-Hamadani - may Allah (swt) be pleased with them all - from Ali ibn Ibrahim ibn Hashim, from his father, from Mamar ibn Khallad.