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"Say (O Muhammad sal-Allaahu 'alayhe wa sallam to these hypocrites who ask your permission to run away from you): "Flight will not avail you if you flee from death or killing, and then you will enjoy no more than a little while!"" [Al-Ahzaab (33):16]

Narrated Talha bin 'Ubaidullah:

A man from Najd with unkempt hair came to Allah's Apostle and we heard his loud voice but could not understand what he was saying, till he came near and then we came to know that he was asking about Islam. Allah's Apostle said, "You have to offer prayers perfectly five times in a day and night (24 hours)." The man asked, "Is there any more (praying)?" Allah's Apostle replied, "No, but if you want to offer the Nawafil prayers (you can)." Allah's Apostle further said to him: "You have to observe fasts during the month of Ramad, an." The man asked, "Is there any more fasting?" Allah's Apostle replied, "No, but if you want to observe the Nawafil fasts (you can.)" Then Allah's Apostle further said to him, "You have to pay the Zakat (obligatory charity)." The man asked, "Is there any thing other than the Zakat for me to pay?" Allah's Apostle replied, "No, unless you want to give alms of your own." And then that man retreated saying, "By Allah! I will neither do less nor more than this." Allah's Apostle said, "If what he said is true, then he will be successful (i.e. he will be granted Paradise)." [The Book of Faith Volume 1, Book 2, Hadeeth 44]