The word مرض in the Quran

فِى قُلُوبِهِم مَّرَضٌ فَزَادَهُمُ ٱللَّهُ مَرَضًا وَلَهُمْ عَذَابٌ أَلِيمٌۢ بِمَا كَانُوا۟ يَكْذِبُونَ ۝١٠

In their hearts is disease, so Allāh has increased their disease; and for them is a painful punishment because they [habitually] used to lie.

فَتَرَى ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ يُسَٰرِعُونَ فِيهِمْ يَقُولُونَ نَخْشَىٰٓ أَن تُصِيبَنَا دَآئِرَةٌ فَعَسَى ٱللَّهُ أَن يَأْتِىَ بِٱلْفَتْحِ أَوْ أَمْرٍ مِّنْ عِندِهِۦ فَيُصْبِحُوا۟ عَلَىٰ مَآ أَسَرُّوا۟ فِىٓ أَنفُسِهِمْ نَٰدِمِينَ ۝٥٢

So you see those in whose hearts is disease [i.e., hypocrisy] hastening into [association with] them, saying, "We are afraid a misfortune may strike us." But perhaps Allāh will bring conquest or a decision from Him, and they will become, over what they have been concealing within themselves, regretful.

إِذْ يَقُولُ ٱلْمُنَٰفِقُونَ وَٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ غَرَّ هَٰٓؤُلَآءِ دِينُهُمْ وَمَن يَتَوَكَّلْ عَلَى ٱللَّهِ فَإِنَّ ٱللَّهَ عَزِيزٌ حَكِيمٌ ۝٤٩

[Remember] when the hypocrites and those in whose hearts was disease [i.e., arrogance and disbelief] said, "Their religion has deluded those [Muslims]." But whoever relies upon Allāh - then indeed, Allāh is Exalted in Might and Wise.

وَأَمَّا ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ فَزَادَتْهُمْ رِجْسًا إِلَىٰ رِجْسِهِمْ وَمَاتُوا۟ وَهُمْ كَٰفِرُونَ ۝١٢٥

But as for those in whose hearts is disease, it has [only] increased them in evil [in addition] to their evil. And they will have died while they are disbelievers.

لِّيَجْعَلَ مَا يُلْقِى ٱلشَّيْطَٰنُ فِتْنَةً لِّلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ وَٱلْقَاسِيَةِ قُلُوبُهُمْ وَإِنَّ ٱلظَّٰلِمِينَ لَفِى شِقَاقٍۭ بَعِيدٍ ۝٥٣

[That is] so He may make what Satan throws in [i.e., asserts] a trial for those within whose hearts is disease and those hard of heart. And indeed, the wrongdoers are in extreme dissension.

أَفِى قُلُوبِهِم مَّرَضٌ أَمِ ٱرْتَابُوٓا۟ أَمْ يَخَافُونَ أَن يَحِيفَ ٱللَّهُ عَلَيْهِمْ وَرَسُولُهُۥ بَلْ أُو۟لَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ ۝٥٠

Is there disease in their hearts? Or have they doubted? Or do they fear that Allāh will be unjust to them, or His Messenger? Rather, it is they who are the wrongdoers [i.e., the unjust].

وَإِذَا مَرِضْتُ فَهُوَ يَشْفِينِ ۝٨٠

And when I am ill, it is He who cures me

وَإِذْ يَقُولُ ٱلْمُنَٰفِقُونَ وَٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ مَّا وَعَدَنَا ٱللَّهُ وَرَسُولُهُۥٓ إِلَّا غُرُورًا ۝١٢

And [remember] when the hypocrites and those in whose hearts is disease said, "Allāh and His Messenger did not promise us except delusion,"

يَٰنِسَآءَ ٱلنَّبِىِّ لَسْتُنَّ كَأَحَدٍ مِّنَ ٱلنِّسَآءِ إِنِ ٱتَّقَيْتُنَّ فَلَا تَخْضَعْنَ بِٱلْقَوْلِ فَيَطْمَعَ ٱلَّذِى فِى قَلْبِهِۦ مَرَضٌ وَقُلْنَ قَوْلًا مَّعْرُوفًا ۝٣٢

O wives of the Prophet, you are not like anyone among women. If you fear Allāh, then do not be soft in speech [to men], lest he in whose heart is disease should covet, but speak with appropriate speech.

لَّئِن لَّمْ يَنتَهِ ٱلْمُنَٰفِقُونَ وَٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ وَٱلْمُرْجِفُونَ فِى ٱلْمَدِينَةِ لَنُغْرِيَنَّكَ بِهِمْ ثُمَّ لَا يُجَاوِرُونَكَ فِيهَآ إِلَّا قَلِيلًا ۝٦٠

If the hypocrites and those in whose hearts is disease and those who spread rumors in al-Madīnah do not cease, We will surely incite you against them; then they will not remain your neighbors therein except for a little,

وَيَقُولُ ٱلَّذِينَ ءَامَنُوا۟ لَوْلَا نُزِّلَتْ سُورَةٌ فَإِذَآ أُنزِلَتْ سُورَةٌ مُّحْكَمَةٌ وَذُكِرَ فِيهَا ٱلْقِتَالُ رَأَيْتَ ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ يَنظُرُونَ إِلَيْكَ نَظَرَ ٱلْمَغْشِىِّ عَلَيْهِ مِنَ ٱلْمَوْتِ فَأَوْلَىٰ لَهُمْ ۝٢٠

Those who believe say, "Why has a sūrah not been sent down?" But when a precise sūrah is revealed and battle is mentioned therein, you see those in whose hearts is disease [i.e., hypocrisy] looking at you with a look of one overcome by death. And more appropriate for them [would have been]

أَمْ حَسِبَ ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ أَن لَّن يُخْرِجَ ٱللَّهُ أَضْغَٰنَهُمْ ۝٢٩

Or do those in whose hearts is disease think that Allāh would never expose their [feelings of] hatred?

وَمَا جَعَلْنَآ أَصْحَٰبَ ٱلنَّارِ إِلَّا مَلَٰٓئِكَةً وَمَا جَعَلْنَا عِدَّتَهُمْ إِلَّا فِتْنَةً لِّلَّذِينَ كَفَرُوا۟ لِيَسْتَيْقِنَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ وَيَزْدَادَ ٱلَّذِينَ ءَامَنُوٓا۟ إِيمَٰنًا وَلَا يَرْتَابَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ وَٱلْمُؤْمِنُونَ وَلِيَقُولَ ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ وَٱلْكَٰفِرُونَ مَاذَآ أَرَادَ ٱللَّهُ بِهَٰذَا مَثَلًا كَذَٰلِكَ يُضِلُّ ٱللَّهُ مَن يَشَآءُ وَيَهْدِى مَن يَشَآءُ وَمَا يَعْلَمُ جُنُودَ رَبِّكَ إِلَّا هُوَ وَمَا هِىَ إِلَّا ذِكْرَىٰ لِلْبَشَرِ ۝٣١

And We have not made the keepers of the Fire except angels. And We have not made their number except as a trial for those who disbelieve - that those who were given the Scripture will be convinced and those who have believed will increase in faith and those who were given the Scripture and the believers will not doubt and that those in whose hearts is disease [i.e., hypocrisy] and the disbelievers will say, "What does Allāh intend by this as an example?" Thus does Allāh send astray whom He wills and guide whom He wills. And none knows the soldiers of your Lord except Him. And it [i.e., mention of the Fire] is not but a reminder to humanity.