The Messenger of Allah (pbuh) said: 'Cleanliness is half of faith, and [saying] 'Praise be to God' fills the scale, and [saying] 'Glory be to God' and 'Praise be to God' fill up what is between the heavens and the earth, and prayer is a light, and charity is proof [of one's faith], and patience is a brightness, and the Qur'an is a proof for or against you. All men go out early in the morning and sell themselves, some setting themselves free and others destroying themselves.'(Narrated by Muslim)
(2:83) Remember that We made a solemn covenant with the children of Israel to this effect: worship none save Allah: be good to your parents, to your relatives, to the orphans and to the helpless; speak aright with the people: establish the Salat and pay the Zakat. But with the exception of a few, you all slid back from it and are paying no heed to it even now.