Quran 4:90 — Women (Al-Nesa')

Exempted are those who join people with whom you have signed a peace treaty, and those who come to you wishing not to fight you, nor fight their relatives. Had GOD willed, He could have permitted them to fight against you. Therefore, if they leave you alone, refrain from fighting you, and offer you peace, then GOD gives you no excuse to fight them.

[4:89] They wish that you disbelieve as they have disbelieved, then you become equal. Do not consider them friends, unless they mobilize along with you in the cause of GOD. If they turn against you, you shall fight them, and you may kill them when you encounter them in war. You shall not accept them as friends, or allies.*

[4:91] You will find others who wish to make peace with you, and also with their people. However, as soon as war erupts, they fight against you. Unless these people leave you alone, offer you peace, and stop fighting you, you may fight them when you encounter them. Against these, we give you a clear authorization.