21-4 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that Ali ibn Ibrahim ibn Hashim quoted his father, on the authority of Yasir - the servant (of Imam Al-Ridha (MGB)),

“I asked Al-Ridha (MGB), ‘Would the month of Ramazan ever be twenty-nine days?’’ The Imam (MGB) replied, ‘No. The month of Ramazan will never be less than thirty days.’”