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 5:92

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-Tawbah 9:122

وَمَا كَانَ ٱلْمُؤْمِنُونَ لِيَنفِرُوا۟ كَآفَّةً فَلَوْلَا نَفَرَ مِن كُلِّ فِرْقَةٍ مِّنْهُمْ طَآئِفَةٌ لِّيَتَفَقَّهُوا۟ فِى ٱلدِّينِ وَلِيُنذِرُوا۟ قَوْمَهُمْ إِذَا رَجَعُوٓا۟ إِلَيْهِمْ لَعَلَّهُمْ يَحْذَرُونَ

wa-mā kāna l-muʾminūna li-yanfirū kāffatan fa-lawlā nafara min kulli firqatin minhum ṭāʾifatun li-yatafaqqahū fī l-dīni wa-li-yundhirū qawmahum idhā rajaʿū ilayhim la-ʿallahum yaḥdharūna

Nor should the Believers all go forth together: if a contingent from every expedition remained behind, they could devote themselves to studies in religion, and admonish the people when they return to them,- that thus they (may learn) to guard themselves (against evil).

Sura al-Qaṣaṣ 28:6

وَنُمَكِّنَ لَهُمْ فِى ٱلْأَرْضِ وَنُرِىَ فِرْعَوْنَ وَهَٰمَٰنَ وَجُنُودَهُمَا مِنْهُم مَّا كَانُوا۟ يَحْذَرُونَ

wa-numakkina lahum fī l-arḍi wa-nuriya firʿawna wa-hāmāna wa-junūdahumā minhum mā kānū yaḥdharūna

To establish a firm place for them in the land, and to show Pharaoh, Haman, and their hosts, at their hands, the very things against which they were taking precautions.

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.