8. A number of our people have narrated from Muhammad ibn ‘Isa from Ali ibn Bilal who has said the following: “I once wrote to the man (the Imam) , asking about the amount of al-Fitrah. He (the Imam) wrote the answer, ‘It is six Artal of dates by al-Madiniy Artal which is nine Artal by al- Baghdadiy ones.”’