21-5 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that his uncle Muhammad ibn Abil-Qasim quoted Ahmad ibn Aba Abdullah al-Barqy, on the authority of Abil Hassan Ali ibn al-Hussein al-Reqqi,on the authority of Abdullah ibn Jaballe, on the authority of Muawiyah ibn Ammar, on the authority of Al-Hassan ibn Abdullah, on the authority of his forefathers, on the authority of his grandfather Al-Hassan ibn Ali ibn Abi Talib (MGB),

“Several Jews went to see the Prophet of God (MGB) and one of them asked him several questions which included the following question, ‘Why has God made it incumbent upon your nation to fast for thirty days while He has made it incumbent for other nations to fast for more days?’ The Prophet (MGB) said, ‘Indeed when Adam ate from the tree, the fruit remained in his stomach for thirty days before it was digested. That is why the Honorable the Exalted God made it incumbent upon his offspring to abstain from eating and drinking for thirty days. What they are allowed to eat and drink during these thirty days is due to the Honorable the Exalted God’s Nobility. God has imposed the same restrictions on my nation that He imposed on Adam (MGB). Then the Prophet (MGB) recited the following verse, ‘Fasting is prescribed for you as it was prescribed for those before you, that ye may (learn) self-restraint,- (Fasting) for a fixed number of days;’ The Jew said, ‘O Muhammad! You are right!’”