Everything in this book that narrates the incident where a group of Jews came to the Messenger of Allah سبحانه وتعالى, peace and blessings be upon him and his family, and asked him various questions - including when they asked: "O' Muhammad, for what reason do you perform ablution on these four limbs?" and similar questions - has been transmitted by me from Ali ibn Ahmad ibn Abdullah Al-Barqi - may Allah سبحانه وتعالى be pleased with him - from his father, from his grandfather Ahmad ibn Abi Abdullah, from his father, from Abu Al-Hasan Ali ibn Al-Husayn Al-Barqi, from Abdullah ibn Jabala, from Mu'awiyah ibn Ammar, from Al-Hasan ibn Abdullah, from his forefathers, from his grandfather Al-Hasan ibn Ali ibn Abi Talib, peace be upon them.