Thy Lord doth know that thou standest forth (to prayer) nigh two-thirds of the night, or half the night, or a third of the night, and so doth a party of those with thee. But God doth appoint night and day in due measure He knoweth that ye are unable to keep count thereof. So He hath turned to you (in mercy): read ye, therefore, of the Qur'an as much as may be easy for you. He knoweth that there may be (some) among you in ill-health; others travelling through the land, seeking of God's bounty; yet others fighting in God's Cause, read ye, therefore, as much of the Qur'an as may be easy (for you); and establish regular Prayer and give regular Charity; and loan to God a Beautiful Loan. And whatever good ye send forth for your souls ye shall find it in God's Presence,- yea, better and greater, in Reward and seek ye the Grace of God: for God is Oft-Forgiving, Most Merciful. (73:20)