“I once asked abu al-Hassan (a.s.), about a man who is an old man or suffering from an illness who is afraid of congestion due to large number of people, if he can assume the state of Ihram for al-Hajj and leave for Mina on the day of al-Tarwiyah (eight of Dhu al-Hajjah). He (the Imam) said, ‘Yes, he can do so.’ I then asked, ‘Can a man in good health leave in search for a place and rest in that place ? He (the Imam) said, ‘No, he cannot do so . I then asked, ‘Can he leave one day before ? He (the Imam) said, ‘Yes, he can do so . I then asked, ‘Can he leave two days earlier ? He (the Imam) said, ‘Yes, he can do so . I asked, ‘Can he leave three days before ? He (the Imam) said, ‘Yes, he can do so . I then asked, ‘Can he leave more than three days earlier? He (the Imam) said, ‘No, he cannot do so . ‘“