22-20 Al-Hassan ibn Ahmad ibn Idris - may God be pleased with him - narrated that his father quoted on Muhammad ibn Ali ibn Mahboob, on the authority of Muhammad ibn al-Hassan, on the authority of Al-Hassan ibn Ali ibn Faz’zal, on the authority of Ali ibn Aqabah ibn Khalid, on the authority of his father Aqabah ibn Khalid, on the authority of Aba Abdullah as-Sadiq (MGB), on the authority of his father (MGB), on the authority of his forefathers (MGB) that the
Commander of the Faithful Imam Ali (MGB) said, “The neighborhood zone of a mosque is forty ells , and the precincts of a mosque span out to forty houses away in each direction.”