“I once asked abu Ibrahim (a.s.), about a man who has made obligatory upon himself to fast one month in al-Kufah, one month in al-Madinah and one month in Makkah because of an affliction whereby he suffered. He fasted one month in al-Kufah, then he entered al-Madinah and fasted for eighteen days, but then the camel man did not stay any longer. He (the Imam) said, ‘He can fast the remaining days at home when he comes back.’”