5. Ahmad ibn Muhammad from has narrated from ibn abu al-Suhban from Muhammad ibn Bakr ibn Janah from Ali ibn Shajarah from Bashir al-Nabbal who has said the following
“I once asked Abu `Abd Allah (a.s.), about the case of a doubtful day. He (the Imam) said, ’Fast on such day, if it is of al-Sha £ ban, it is optional and if it is of the month of Ramadan then it is a day in which you have a fortunate chance.’”