Disbelief after Belief

And whoever turns away from their faith and dies in disbelief, their deeds will be worthless in this world and the Hereafter. They will be companions of the Fire.

2:217They question thee (O Muhammad) with regard to warfare in the sacred month. Say: Warfare therein is a great (transgression), but to turn (men) from the way of Allah, and to disbelieve in Him and in the Inviolable Place of Worship, and to expel His people thence, is a greater with Allah; for persecution is worse than killing. And they will not cease from fighting against you till they have made you renegades from your religion, if they can. And whoso becometh a renegade and dieth in his disbelief: such are they whose works have fallen both in the world and the Hereafter. Such are rightful owners of the Fire: they will abide therein.

3:22Those are they whose works have failed in the world and the Hereafter; and they have no helpers.

4:18The forgiveness is not for those who do ill-deeds until, when death attendeth upon one of them, he saith: Lo! I repent now; nor yet for those who die while they are disbelievers. For such We have prepared a painful doom.

18:105Those are they who disbelieve in the revelations of their Lord and in the meeting with Him. Therefor their works are vain, and on the Day of Resurrection We assign no weight to them.

47:34Lo! those who disbelieve and turn from the way of Allah and then die disbelievers, Allah surely will not pardon them.