Sura al-Baqara 2:222

وَيَسْـَٔلُونَكَ عَنِ ٱلْمَحِيضِ قُلْ هُوَ أَذًى فَٱعْتَزِلُوا۟ ٱلنِّسَآءَ فِى ٱلْمَحِيضِ وَلَا تَقْرَبُوهُنَّ حَتَّىٰ يَطْهُرْنَ فَإِذَا تَطَهَّرْنَ فَأْتُوهُنَّ مِنْ حَيْثُ أَمَرَكُمُ ٱللَّـهُ إِنَّ ٱللَّـهَ يُحِبُّ ٱلتَّوَّٰبِينَ وَيُحِبُّ ٱلْمُتَطَهِّرِينَ

wa-yasʾalūnaka ʿani l-maḥīḍi qul huwa adhan faʿtazilū l-nisāʾa fī l-maḥīḍi wa-lā taqrabūhunna ḥattā yaṭhurna fa-idhā taṭahharna fatūhunna min ḥaythu amarakumu allāhu inna allāha yuḥibbu l-tawwābīna wa-yuḥibbu l-mutaṭahhirīna

They ask thee concerning women's courses. Say: They are a hurt and a pollution: So keep away from women in their courses, and do not approach them until they are clean. But when they have purified themselves, ye may approach them in any manner, time, or place ordained for you by Allah. For Allah loves those who turn to Him constantly and He loves those who keep themselves pure and clean.

Sura al-Nisāʾ 4:90

إِلَّا ٱلَّذِينَ يَصِلُونَ إِلَىٰ قَوْمٍۭ بَيْنَكُمْ وَبَيْنَهُم مِّيثَٰقٌ أَوْ جَآءُوكُمْ حَصِرَتْ صُدُورُهُمْ أَن يُقَٰتِلُوكُمْ أَوْ يُقَٰتِلُوا۟ قَوْمَهُمْ وَلَوْ شَآءَ ٱللَّـهُ لَسَلَّطَهُمْ عَلَيْكُمْ فَلَقَٰتَلُوكُمْ فَإِنِ ٱعْتَزَلُوكُمْ فَلَمْ يُقَٰتِلُوكُمْ وَأَلْقَوْا۟ إِلَيْكُمُ ٱلسَّلَمَ فَمَا جَعَلَ ٱللَّـهُ لَكُمْ عَلَيْهِمْ سَبِيلًا

illā lladhīna yaṣilūna ilā qawmin baynakum wa-baynahum mīthāqun aw jāʾūkum ḥaṣirat ṣudūruhum an yuqātilūkum aw yuqātilū qawmahum wa-law shāʾa allāhu la-sallaṭahum ʿalaykum fa-la-qātalūkum fa-ini iʿtazalūkum fa-lam yuqātilūkum wa-alqaw ilaykumu l-salama fa-mā jaʿala allāhu la-kum ʿalayhim sabīlan

Except those who join a group between whom and you there is a treaty (of peace), or those who approach you with hearts restraining them from fighting you as well as fighting their own people. If Allah had pleased, He could have given them power over you, and they would have fought you: Therefore if they withdraw from you but fight you not, and (instead) send you (Guarantees of) peace, then Allah Hath opened no way for you (to war against them).

Sura al-Nisāʾ 4:91

سَتَجِدُونَ ءَاخَرِينَ يُرِيدُونَ أَن يَأْمَنُوكُمْ وَيَأْمَنُوا۟ قَوْمَهُمْ كُلَّ مَا رُدُّوٓا۟ إِلَى ٱلْفِتْنَةِ أُرْكِسُوا۟ فِيهَا فَإِن لَّمْ يَعْتَزِلُوكُمْ وَيُلْقُوٓا۟ إِلَيْكُمُ ٱلسَّلَمَ وَيَكُفُّوٓا۟ أَيْدِيَهُمْ فَخُذُوهُمْ وَٱقْتُلُوهُمْ حَيْثُ ثَقِفْتُمُوهُمْ وَأُو۟لَٰٓئِكُمْ جَعَلْنَا لَكُمْ عَلَيْهِمْ سُلْطَٰنًا مُّبِينًا

sa-tajidūna ākharīna yurīdūna an yaʾmanūkum wa-yaʾmanū qawmahum kulla mā ruddū ilā l-fitnati urkisū fīhā fa-in lam yaʿtazilūkum wa-yulqū ilaykumu l-salama wa-yakuffū aydiyahum fa-khudhūhum wa-aqtulūhum ḥaythu thaqiftumūhum wa-ūlāʾikum jaʿalnā la-kum ʿalayhim sulṭānan mubīnan

Others you will find that wish to gain your confidence as well as that of their people: Every time they are sent back to temptation, they succumb thereto: if they withdraw not from you nor give you (guarantees) of peace besides restraining their hands, seize them and slay them wherever ye get them: In their case We have provided you with a clear argument against them.

Sura al-Kahf 18:16

وَإِذِ ٱعْتَزَلْتُمُوهُمْ وَمَا يَعْبُدُونَ إِلَّا ٱللَّـهَ فَأْوُۥٓا۟ إِلَى ٱلْكَهْفِ يَنشُرْ لَكُمْ رَبُّكُم مِّن رَّحْمَتِهِۦ وَيُهَيِّئْ لَكُم مِّنْ أَمْرِكُم مِّرْفَقًا

wa-idhi iʿtazaltumūhum wa-mā yaʿbudūna illā allāha fawu ilā l-kahfi yanshur la-kum rabbukum min rraḥmatihi wa-yuhayyiʾ la-kum min amrikum mirfaqan

"When ye turn away from them and the things they worship other than Allah, betake yourselves to the Cave: Your Lord will shower His mercies on you and disposes of your affair towards comfort and ease."

Sura al-Dukhān 44:21

وَإِن لَّمْ تُؤْمِنُوا۟ لِى فَٱعْتَزِلُونِ

wa-in lam tūʾminū lī fa-ʿtazilūni

"If ye believe me not, at least keep yourselves away from me."