The Cow - 2:217
"They ask you about fighting in the Holy Month. Say: "Fighting on it is a great sin. But to turn away from the way of Allah and to be ungrateful to Him and to the Holy Mosque and to drive out its people from it is a greater sin with Allah. For oppression and cruelty is a greater crime than killing."If they could, they would fight you until they turn you back from your religion. Whoever of you turns away from his religion and dies as an unbeliever, all that he did will be in vain in this world and in the Hereafter. They are the people of the Fire and will abide therein forever."
Whoever apostatizes and dies a disbeliever:
The Table Spread/5:114
"Jesus son of Mary: "Our God, our Lord, send down to us a banquet from heaven, so that it may be a feast for each of us and for all of us, and a proof from You. Provide for us. You are the best provider."
The Table Spread/5:115
"Allah said: "I will send it down to you,"He said: "Whoever disbelieves after that, I will punish him with a torment which I have never given to anyone."
The Repentance/9:74
Although they speak words of disbelief and disbelieve after they have surrendered, they swear by Allah that they did not say them. In fact, they strived hard for what they could never attain. They sought revenge after Allah and His messenger had enriched them with His grace! It would be good for them if they repent. If they turn away, Allah will punish them with a painful torment in this world and in the Hereafter, and they will have neither friends nor helpers in the earth.
The Women/4:137
Those who believe and then disbelieve, and believe again and then disbelieve again, and then go further in their disbelief, Allah will not forgive them nor guide them.
The Bee/16:106
Those who disbelieve in Allah and open their hearts to disbelief after faith, except those whose hearts are full of faith but are forced to disbelieve, have deserved wrath from Allah and for them is a painful torment.
Muhammad/47:34
Allah will not forgive those who die as disbelievers after they disbelieved and strayed from the way of Allah.
The Hypocrites/63:3
Because they disbelieved after they believed, so their hearts were sealed; they do not understand.
The Family Of Imran/3:90
The repentance of those who disbelieved after their belief and went further in their disbelief will not be accepted; they have gone astray.
The Family Of Imran/3:91
Those who disbelieve and die as disbelievers will not be accepted from them even if they give the world´s gold as ransom. They have deserved a painful torment and they will have no helpers.
The Cow/2:161
And those who disbelieve and die as disbelievers will earn the curse of Allah, the angels and the people.
The Family Of Imran/3:106
"On that Day some faces will be justified and some faces will be darkened. Those whose faces will be darkened will be told: "Did you disbelieve after you believed? Taste the torment for your disbelief."
The Repentance/9:66
Do not apologize. You disbelieved after you believed. Even if We forgive some of you, We will punish some of you for their crime.
The Table Spread/5:112
"The Apostles said, "Jesus son of Mary, may your Lord give us a feast from heaven."He said, "Honor Allah if you believe."
The Table Spread/5:113
We ask that we may eat of it, and that our hearts may be calmed, and that we may know that you tell us the truth, and that we may bear witness to it.