9-19 Muhammad ibn al-Hassan ibn Ahmad ibn al-Walid - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Muhammad ibn Ahmad ibn Yahya ibn Imran al-Ash’ari, on the authority of Musa ibn Umar, on the authority of Muhammad ibn Sin’an, on the authority of Abi Sa’id al-Qimat, on the authority of someone who linked it up to Aba Abdullah as-Sadiq (MGB),

“God’s Prophet (MGB) established the alms-tax upon nine things and he forgave other things. They are: wheat, barley, dates, raisins, gold, silver, cows, sheep and camels.’ Someone asked, ‘How about corn?’ The Imam (MGB) became angry and said, ‘I swear by God that in the Prophet’s (MGB) lifetime sesame seeds, corn and birds’ seeds were all available.’ He was told, ‘It is said that these did not exist at the time of the Prophet (MGB). That is why he (MGB) has only established the alms-tax on those nine items.’ The Imam (MGB) became angry again and said, ‘They lie. The Prophet’s (MGB) explicit order was to forgive everything else. One may only forgive what exists. I swear by God that the alms-tax has been made obligatory on nothing else but these nine things. Whoever wishes can accept it and anyone who doesn’t wish can deny it and become an atheist.’”