On Various Traditions From Imam Ali Ibn Musa al-Ridha صلى الله عليه وعلى آله وسلم

28-18 (The author of the book narrated) my father - may God be pleased with him - narrated that Ali ibn Ibrahim ibn Hashem quoted on the authority of Ahmad ibn Abdullah al-Khalnaji, on the authority of thefather of Ali Al-Hassan ibn Rashid, “I asked Al-Ridha صلى الله عليه وعلى آله وسلم about the number of times the opening to the call to prayer (Allahu Akbar) must be said. He صلى الله عليه وعلى آله وسلم replied, “It is seven times.” I said, “It has been narrated that God’s Prophet صلى الله عليه وعلى آله وسلم said only one.” The Imam صلى الله عليه وعلى آله وسلم replied, “God’s Prophet صلى الله عليه وعلى آله وسلم said it loudly once and said it quietly the other six times.”