Kufr (denial of the truth)

Al-Baqarah 2:108

أَمۡ تُرِيدُونَ أَن تَسۡـَٔلُواْ رَسُولَكُمۡ كَمَا سُئِلَ مُوسَىٰ مِن قَبۡلُۗ وَمَن يَتَبَدَّلِ ٱلۡكُفۡرَ بِٱلۡإِيمَٰنِ فَقَدۡ ضَلَّ سَوَآءَ ٱلسَّبِيلِ ١٠٨

Or do you intend to ask your Messenger as Moses was asked before? And whoever exchanges faith for disbelief has certainly strayed from the soundness of the way.

Āl-‘Imrān 3:52

۞ فَلَمَّآ أَحَسَّ عِيسَىٰ مِنۡهُمُ ٱلۡكُفۡرَ قَالَ مَنۡ أَنصَارِيٓ إِلَى ٱللَّهِۖ قَالَ ٱلۡحَوَارِيُّونَ نَحۡنُ أَنصَارُ ٱللَّهِ ءَامَنَّا بِٱللَّهِ وَٱشۡهَدۡ بِأَنَّا مُسۡلِمُونَ ٥٢

But when Jesus felt [persistence in] disbelief from them, he said, "Who are my supporters for [the cause of] Allah?" The disciples said, "We are supporters for Allah. We have believed in Allah and testify that we are Muslims [submitting to Him].

Āl-‘Imrān 3:80

وَلَا يَأۡمُرَكُمۡ أَن تَتَّخِذُواْ ٱلۡمَلَٰٓئِكَةَ وَٱلنَّبِيِّـۧنَ أَرۡبَابًاۚ أَيَأۡمُرُكُم بِٱلۡكُفۡرِ بَعۡدَ إِذۡ أَنتُم مُّسۡلِمُونَ ٨٠

Nor could he order you to take the angels and prophets as lords. Would he order you to disbelief after you had been Muslims?

Āl-‘Imrān 3:167

وَلِيَعۡلَمَ ٱلَّذِينَ نَافَقُواْۚ وَقِيلَ لَهُمۡ تَعَالَوۡاْ قَٰتِلُواْ فِي سَبِيلِ ٱللَّهِ أَوِ ٱدۡفَعُواْۖ قَالُواْ لَوۡ نَعۡلَمُ قِتَالٗا لَّٱتَّبَعۡنَٰكُمۡۗ هُمۡ لِلۡكُفۡرِ يَوۡمَئِذٍ أَقۡرَبُ مِنۡهُمۡ لِلۡإِيمَٰنِۚ يَقُولُونَ بِأَفۡوَٰهِهِم مَّا لَيۡسَ فِي قُلُوبِهِمۡۚ وَٱللَّهُ أَعۡلَمُ بِمَا يَكۡتُمُونَ ١٦٧

And that He might make evident those who are hypocrites. For it was said to them, "Come, fight in the way of Allah or [at least] defend." They said, "If we had known [there would be] fighting, we would have followed you." They were nearer to disbelief that day than to faith, saying with their mouths what was not in their hearts. And Allah is most Knowing of what they conceal -

Āl-‘Imrān 3:177

إِنَّ ٱلَّذِينَ ٱشۡتَرَوُاْ ٱلۡكُفۡرَ بِٱلۡإِيمَٰنِ لَن يَضُرُّواْ ٱللَّهَ شَيۡـٔٗاۖ وَلَهُمۡ عَذَابٌ أَلِيمٞ ١٧٧

Indeed, those who purchase disbelief [in exchange] for faith - never will they harm Allah at all, and for them is a painful punishment.

Al-Mā’idah 5:41

۞ يَٰٓأَيُّهَا ٱلرَّسُولُ لَا يَحۡزُنكَ ٱلَّذِينَ يُسَٰرِعُونَ فِي ٱلۡكُفۡرِ مِنَ ٱلَّذِينَ قَالُوٓاْ ءَامَنَّا بِأَفۡوَٰهِهِمۡ وَلَمۡ تُؤۡمِن قُلُوبُهُمۡۛ وَمِنَ ٱلَّذِينَ هَادُواْۛ سَمَّٰعُونَ لِلۡكَذِبِ سَمَّٰعُونَ لِقَوۡمٍ ءَاخَرِينَ لَمۡ يَأۡتُوكَۖ يُحَرِّفُونَ ٱلۡكَلِمَ مِنۢ بَعۡدِ مَوَاضِعِهِۦۖ يَقُولُونَ إِنۡ أُوتِيتُمۡ هَٰذَا فَخُذُوهُ وَإِن لَّمۡ تُؤۡتَوۡهُ فَٱحۡذَرُواْۚ وَمَن يُرِدِ ٱللَّهُ فِتۡنَتَهُۥ فَلَن تَمۡلِكَ لَهُۥ مِنَ ٱللَّهِ شَيۡـًٔاۚ أُوْلَٰٓئِكَ ٱلَّذِينَ لَمۡ يُرِدِ ٱللَّهُ أَن يُطَهِّرَ قُلُوبَهُمۡۚ لَهُمۡ فِي ٱلدُّنۡيَا خِزۡيٞۖ وَلَهُمۡ فِي ٱلۡأٓخِرَةِ عَذَابٌ عَظِيمٞ ٤١

O Messenger, let them not grieve you who hasten into disbelief of those who say, "We believe" with their mouths, but their hearts believe not, and from among the Jews. [They are] avid listeners to falsehood, listening to another people who have not come to you. They distort words beyond their [proper] usages, saying "If you are given this, take it; but if you are not given it, then beware." But he for whom Allah intends fitnah - never will you possess [power to do] for him a thing against Allah. Those are the ones for whom Allah does not intend to purify their hearts. For them in this world is disgrace, and for them in the Hereafter is a great punishment.

Al-Mā’idah 5:61

وَإِذَا جَآءُوكُمۡ قَالُوٓاْ ءَامَنَّا وَقَد دَّخَلُواْ بِٱلۡكُفۡرِ وَهُمۡ قَدۡ خَرَجُواْ بِهِۦۚ وَٱللَّهُ أَعۡلَمُ بِمَا كَانُواْ يَكۡتُمُونَ ٦١

And when they come to you, they say, "We believe." But they have entered with disbelief [in their hearts], and they have certainly left with it. And Allah is most knowing of what they were concealing.

At-Taubah 9:12

وَإِن نَّكَثُوٓاْ أَيۡمَٰنَهُم مِّنۢ بَعۡدِ عَهۡدِهِمۡ وَطَعَنُواْ فِي دِينِكُمۡ فَقَٰتِلُوٓاْ أَئِمَّةَ ٱلۡكُفۡرِ إِنَّهُمۡ لَآ أَيۡمَٰنَ لَهُمۡ لَعَلَّهُمۡ يَنتَهُونَ ١٢

And if they break their oaths after their treaty and defame your religion, then fight the leaders of disbelief, for indeed, there are no oaths [sacred] to them; [fight them that] they might cease.

At-Taubah 9:17

مَا كَانَ لِلۡمُشۡرِكِينَ أَن يَعۡمُرُواْ مَسَٰجِدَ ٱللَّهِ شَٰهِدِينَ عَلَىٰٓ أَنفُسِهِم بِٱلۡكُفۡرِۚ أُوْلَٰٓئِكَ حَبِطَتۡ أَعۡمَٰلُهُمۡ وَفِي ٱلنَّارِ هُمۡ خَٰلِدُونَ ١٧

It is not for the polytheists to maintain the mosques of Allah [while] witnessing against themselves with disbelief. [For] those, their deeds have become worthless, and in the Fire they will abide eternally.

At-Taubah 9:23

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا تَتَّخِذُوٓاْ ءَابَآءَكُمۡ وَإِخۡوَٰنَكُمۡ أَوۡلِيَآءَ إِنِ ٱسۡتَحَبُّواْ ٱلۡكُفۡرَ عَلَى ٱلۡإِيمَٰنِۚ وَمَن يَتَوَلَّهُم مِّنكُمۡ فَأُوْلَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ ٢٣

O you who have believed, do not take your fathers or your brothers as allies if they have preferred disbelief over belief. And whoever does so among you - then it is those who are the wrongdoers.

At-Taubah 9:37

إِنَّمَا ٱلنَّسِيٓءُ زِيَادَةٞ فِي ٱلۡكُفۡرِۖ يُضَلُّ بِهِ ٱلَّذِينَ كَفَرُواْ يُحِلُّونَهُۥ عَامٗا وَيُحَرِّمُونَهُۥ عَامٗا لِّيُوَاطِـُٔواْ عِدَّةَ مَا حَرَّمَ ٱللَّهُ فَيُحِلُّواْ مَا حَرَّمَ ٱللَّهُۚ زُيِّنَ لَهُمۡ سُوٓءُ أَعۡمَٰلِهِمۡۗ وَٱللَّهُ لَا يَهۡدِي ٱلۡقَوۡمَ ٱلۡكَٰفِرِينَ ٣٧

Indeed, the postponing [of restriction within sacred months] is an increase in disbelief by which those who have disbelieved are led [further] astray. They make it lawful one year and unlawful another year to correspond to the number made unlawful by Allah and [thus] make lawful what Allah has made unlawful. Made pleasing to them is the evil of their deeds; and Allah does not guide the disbelieving people.

At-Taubah 9:74

يَحۡلِفُونَ بِٱللَّهِ مَا قَالُواْ وَلَقَدۡ قَالُواْ كَلِمَةَ ٱلۡكُفۡرِ وَكَفَرُواْ بَعۡدَ إِسۡلَٰمِهِمۡ وَهَمُّواْ بِمَا لَمۡ يَنَالُواْۚ وَمَا نَقَمُوٓاْ إِلَّآ أَنۡ أَغۡنَىٰهُمُ ٱللَّهُ وَرَسُولُهُۥ مِن فَضۡلِهِۦۚ فَإِن يَتُوبُواْ يَكُ خَيۡرٗا لَّهُمۡۖ وَإِن يَتَوَلَّوۡاْ يُعَذِّبۡهُمُ ٱللَّهُ عَذَابًا أَلِيمٗا فِي ٱلدُّنۡيَا وَٱلۡأٓخِرَةِۚ وَمَا لَهُمۡ فِي ٱلۡأَرۡضِ مِن وَلِيّٖ وَلَا نَصِيرٖ ٧٤

They swear by Allah that they did not say [anything against the Prophet] while they had said the word of disbelief and disbelieved after their [pretense of] Islam and planned that which they were not to attain. And they were not resentful except [for the fact] that Allah and His Messenger had enriched them of His bounty. So if they repent, it is better for them; but if they turn away, Allah will punish them with a painful punishment in this world and the Hereafter. And there will not be for them on earth any protector or helper.

An-Naḥl 16:106

مَن كَفَرَ بِٱللَّهِ مِنۢ بَعۡدِ إِيمَٰنِهِۦٓ إِلَّا مَنۡ أُكۡرِهَ وَقَلۡبُهُۥ مُطۡمَئِنُّۢ بِٱلۡإِيمَٰنِ وَلَٰكِن مَّن شَرَحَ بِٱلۡكُفۡرِ صَدۡرٗا فَعَلَيۡهِمۡ غَضَبٞ مِّنَ ٱللَّهِ وَلَهُمۡ عَذَابٌ عَظِيمٞ ١٠٦

Whoever disbelieves in Allah after his belief... except for one who is forced [to renounce his religion] while his heart is secure in faith. But those who [willingly] open their breasts to disbelief, upon them is wrath from Allah, and for them is a great punishment;

Al-Ḥujurāt 49:7

وَٱعۡلَمُوٓاْ أَنَّ فِيكُمۡ رَسُولَ ٱللَّهِۚ لَوۡ يُطِيعُكُمۡ فِي كَثِيرٖ مِّنَ ٱلۡأَمۡرِ لَعَنِتُّمۡ وَلَٰكِنَّ ٱللَّهَ حَبَّبَ إِلَيۡكُمُ ٱلۡإِيمَٰنَ وَزَيَّنَهُۥ فِي قُلُوبِكُمۡ وَكَرَّهَ إِلَيۡكُمُ ٱلۡكُفۡرَ وَٱلۡفُسُوقَ وَٱلۡعِصۡيَانَۚ أُوْلَٰٓئِكَ هُمُ ٱلرَّٰشِدُونَ ٧

And know that among you is the Messenger of Allah. If he were to obey you in much of the matter, you would be in difficulty, but Allah has endeared to you the faith and has made it pleasing in your hearts and has made hateful to you disbelief, defiance and disobedience. Those are the [rightly] guided.