If you disbelieve, how will you guard yourself against the Day that will make children gray haired, (17)

on which the heaven will split apart, and His promise is done. (18)

This is indeed a Reminder. Let whosoever will take the Path to his Lord. (19)

Your Lord knows that you keep vigil nearly two thirds of the night and sometimes half or onethird of it, and a party of those with you. Allah measures the night and the day. He knows that you cannot count it, and turns to you. Therefore, recite from the Koran as much as is easy (for you); He knows that among you there are the sick and others traveling the road seeking the bounty of Allah; and others fighting in the Way of Allah. So then, recite from it as much as is easy. Establish your prayers, pay the obligatory charity, and lend Allah a generous loan. Whatever good you shall forward to your souls' account, you surely will find it better with Allah, and a mightier wage. And supplicate for the forgiveness of Allah. Allah is the Forgiving, the Merciful. (20)