30-42 (The author of the book narrated) my father - may God be pleased with him - narrated that Ahmad ibn Idris quoted on the authority of Muhammad ibn Ahmad ibn Yahya ibn Imran al-Ash’ari, on the authority of Muhammad ibn Ahmad, on the authority of Al-Hassan ibn Ali ibn Kaysan, on the authority of Musa ibn Salam, “When Abul Hassan Al-Ridha (s) performed the ‘Umra (minor) Hajj pilgrimage, he (s) said farewell to the House (of God). He went to the ‘Babul al-Hannatin and stood up in the mosque behind the Kaaba. He raised up his hands to pray and told us, ‘This is the best location in which one can ask God to fulfill his requests. Saying prayers here is worth praying for sixty months or sixty years elsewhere.’ When he approached the door he said, ‘