This is the Book about which there is no doubt, a guidance for those conscious of Allah – Who believe in the unseen, establish prayer, and spend out of what We have provided for them, And who believe in what has been revealed to you, [O Muhammad], and what was revealed before you, and of the Hereafter they are certain [in faith]. Those are upon [right] guidance from their Lord, and it is those who are the successful. Indeed, those who disbelieve – it is all the same for them whether you warn them or do not warn them – they will not believe. Allah has set a seal upon their hearts and upon their hearing, and over their vision is a veil. And for them is a great punishment.