Sura al-Baqara 2:235

وَلَا جُنَاحَ عَلَيْكُمْ فِيمَا عَرَّضْتُم بِهِۦ مِنْ خِطْبَةِ ٱلنِّسَآءِ أَوْ أَكْنَنتُمْ فِىٓ أَنفُسِكُمْ عَلِمَ ٱللَّـهُ أَنَّكُمْ سَتَذْكُرُونَهُنَّ وَلَٰكِن لَّا تُوَاعِدُوهُنَّ سِرًّا إِلَّآ أَن تَقُولُوا۟ قَوْلًا مَّعْرُوفًا وَلَا تَعْزِمُوا۟ عُقْدَةَ ٱلنِّكَاحِ حَتَّىٰ يَبْلُغَ ٱلْكِتَٰبُ أَجَلَهُۥ وَٱعْلَمُوٓا۟ أَنَّ ٱللَّـهَ يَعْلَمُ مَا فِىٓ أَنفُسِكُمْ فَٱحْذَرُوهُ وَٱعْلَمُوٓا۟ أَنَّ ٱللَّـهَ غَفُورٌ حَلِيمٌ

wa-lā junāḥa ʿalaykum fī-mā ʿarraḍtum bihi min khiṭbati l-nisāʾi aw aknantum fī anfusikum ʿalima allāhu annakum sa-tadhkurūnāhunna wa-lākin lā tuwāʿidūhunna sirran illā an taqūlū qawlan maʿrūfan wa-lā taʿzimū ʿuqdata l-nikāḥi ḥattā yablugha l-kitābu ajalahu waʿlamū annā allāha yaʿlamu mā fī anfusikum faḥdharūhu wa-iʿlamū annā allāha ghafūrun ḥalīmun

There is no blame on you if ye make an offer of betrothal or hold it in your hearts. Allah knows that ye cherish them in your hearts: But do not make a secret contract with them except in terms Honourable, nor resolve on the tie of marriage till the term prescribed is fulfilled. And know that Allah Knoweth what is in your hearts, and take heed of Him; and know that Allah is Oft-forgiving, Most Forbearing.

Sura al-Māʾidah 5:41

يَٰٓأَيُّهَا ٱلرَّسُولُ لَا يَحْزُنكَ ٱلَّذِينَ يُسَٰرِعُونَ فِى ٱلْكُفْرِ مِنَ ٱلَّذِينَ قَالُوٓا۟ ءَامَنَّا بِأَفْوَٰهِهِمْ وَلَمْ تُؤْمِن قُلُوبُهُمْ وَمِنَ ٱلَّذِينَ هَادُوا۟ سَمَّٰعُونَ لِلْكَذِبِ سَمَّٰعُونَ لِقَوْمٍ ءَاخَرِينَ لَمْ يَأْتُوكَ يُحَرِّفُونَ ٱلْكَلِمَ مِنۢ بَعْدِ مَوَاضِعِهِۦ يَقُولُونَ إِنْ أُوتِيتُمْ هَٰذَا فَخُذُوهُ وَإِن لَّمْ تُؤْتَوْهُ فَٱحْذَرُوا۟ وَمَن يُرِدِ ٱللَّـهُ فِتْنَتَهُۥ فَلَن تَمْلِكَ لَهُۥ مِنَ ٱللَّـهِ شَيْـًٔا أُو۟لَٰٓئِكَ ٱلَّذِينَ لَمْ يُرِدِ ٱللَّـهُ أَن يُطَهِّرَ قُلُوبَهُمْ لَهُمْ فِى ٱلدُّنْيَا خِزْىٌ وَلَهُمْ فِى ٱلْأَخِرَةِ عَذَابٌ عَظِيمٌ

yā-ayyuhā l-rasūlu lā yaḥzunka lladhīna yusāriʿūna fī l-kufri mina lladhīna qālū āmannā bi-afwāhihim wa-lam tuʾmin qulūbuhum wa-mina lladhīna hādū sammāʿūna lil-kadhibi sammāʿūna li-qawmin ākharīna lam yaʾtūka yuḥarrifūna l-kalima min baʿdi mawāḍiʿihi yaqūlūna in ūtītum hādhā fakhudhūhu wa-in lam tutawhu faḥdharū wa-man yuridi allāhu fitnatahu fa-lan tamlika lahu mina allāhi shayʾan ulāʾika lladhīna lam yuridi allāhu an yuṭahhira qulūbahum lahum fī l-dunyā khizun wa-lahum fī l-akhirati ʿadhābun ʿaẓīmun

O Messenger! let not those grieve thee, who race each other into unbelief: (whether it be) among those who say "We believe" with their lips but whose hearts have no faith; or it be among the Jews,- men who will listen to any lie,- will listen even to others who have never so much as come to thee. They change the words from their (right) times and places: they say, "If ye are given this, take it, but if not, beware!" If any one's trial is intended by Allah, thou hast no authority in the least for him against Allah. For such - it is not Allah's will to purify their hearts. For them there is disgrace in this world, and in the Hereafter a heavy punishment.

Sura al-Māʾidah 5:49

وَأَنِ ٱحْكُم بَيْنَهُم بِمَآ أَنزَلَ ٱللَّـهُ وَلَا تَتَّبِعْ أَهْوَآءَهُمْ وَٱحْذَرْهُمْ أَن يَفْتِنُوكَ عَنۢ بَعْضِ مَآ أَنزَلَ ٱللَّـهُ إِلَيْكَ فَإِن تَوَلَّوْا۟ فَٱعْلَمْ أَنَّمَا يُرِيدُ ٱللَّـهُ أَن يُصِيبَهُم بِبَعْضِ ذُنُوبِهِمْ وَإِنَّ كَثِيرًا مِّنَ ٱلنَّاسِ لَفَٰسِقُونَ

wa-ani aḥkum baynahum bimā anzala allāhu wa-lā tattabiʿ ahwāʾahum wa-aḥdharhum an yaftinūka ʿan baʿḍi mā anzala allāhu ilayka fa-in tawallaw fa-iʿlam annamā yurīdu allāhu an yuṣībahum bi-baʿḍi dhunūbihim wa-inna kathīran mina l-nāsi lafāsiqūna

And this (He commands): Judge thou between them by what Allah hath revealed, and follow not their vain desires, but beware of them lest they beguile thee from any of that (teaching) which Allah hath sent down to thee. And if they turn away, be assured that for some of their crime it is Allah's purpose to punish them. And truly most men are rebellious.

Sura al-Māʾidah 5:92

وَأَطِيعُوا۟ ٱللَّـهَ وَأَطِيعُوا۟ ٱلرَّسُولَ وَٱحْذَرُوا۟ فَإِن تَوَلَّيْتُمْ فَٱعْلَمُوٓا۟ أَنَّمَا عَلَىٰ رَسُولِنَا ٱلْبَلَٰغُ ٱلْمُبِينُ

wa-aṭīʿū allāha wa-aṭīʿū l-rasūla wa-aḥdharū fa-in tawallaytum fa-iʿlamū annamā ʿalā rasūlinā l-balāghu l-mubīnu

Obey Allah, and obey the Messenger, and beware (of evil): if ye do turn back, know ye that it is Our Messenger's duty to proclaim (the message) in the clearest manner.

Sura al-Tawbah 9:64

يَحْذَرُ ٱلْمُنَٰفِقُونَ أَن تُنَزَّلَ عَلَيْهِمْ سُورَةٌ تُنَبِّئُهُم بِمَا فِى قُلُوبِهِمْ قُلِ ٱسْتَهْزِءُوٓا۟ إِنَّ ٱللَّـهَ مُخْرِجٌ مَّا تَحْذَرُونَ

yaḥdharu l-munāfiqūna an tunazzala ʿalayhim sūratun tunabbiuhum bi-mā fī qulūbihim quli istahziʾū inna allāha mukhrijun mā taḥdharūna

The Hypocrites are afraid lest a Sura should be sent down about them, showing them what is (really passing) in their hearts. Say: "Mock ye! But verily Allah will bring to light all that ye fear (should be revealed).

Sura al-Munāfiqūn 63:4

وَإِذَا رَأَيْتَهُمْ تُعْجِبُكَ أَجْسَامُهُمْ وَإِن يَقُولُوا۟ تَسْمَعْ لِقَوْلِهِمْ كَأَنَّهُمْ خُشُبٌ مُّسَنَّدَةٌ يَحْسَبُونَ كُلَّ صَيْحَةٍ عَلَيْهِمْ هُمُ ٱلْعَدُوُّ فَٱحْذَرْهُمْ قَٰتَلَهُمُ ٱللَّـهُ أَنَّىٰ يُؤْفَكُونَ

wa-idhā raʾaytahum tuʿjibuka ajsāmuhum wa-in yaqūlū tasmaʿ liqawlihim ka-annahum khushubun musannadatun yaḥsabūna kulla ṣayḥatin ʿalayhim humu l-ʿadūwu faḥdharhum qātalahumu allāhu annā yuʾfakūna

When thou lookest at them, their exteriors please thee; and when they speak, thou listenest to their words. They are as (worthless as hollow) pieces of timber propped up, (unable to stand on their own). They think that every cry is against them. They are the enemies; so beware of them. The curse of Allah be on them! How are they deluded (away from the Truth)!

Sura al-Taghābun 64:14

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِنَّ مِنْ أَزْوَٰجِكُمْ وَأَوْلَٰدِكُمْ عَدُوًّا لَّكُمْ فَٱحْذَرُوهُمْ وَإِن تَعْفُوا۟ وَتَصْفَحُوا۟ وَتَغْفِرُوا۟ فَإِنَّ ٱللَّـهَ غَفُورٌ رَّحِيمٌ

yā-ayyuhā lladhīna āmanū inna min azwājikum wa-awlādikum ʿadūwan la-kum fa-iḥdharūhum wa-in taʿfū wa-taṣfaḥū wa-taghfirū fa-inna allāha ghafūrun raḥīmun

O ye who believe! Truly, among your wives and your children are (some that are) enemies to yourselves: so beware of them! But if ye forgive and overlook, and cover up (their faults), verily Allah is Oft-Forgiving, Most Merciful.