(Annisa) 4 : 90
إِلَّا الَّذِينَ يَصِلُونَ إِلَىٰ قَوْمٍ بَيْنَكُمْ وَبَيْنَهُمْ مِيثَاقٌ أَوْ جَاءُوكُمْ حَصِرَتْ صُدُورُهُمْ أَنْ يُقَاتِلُوكُمْ أَوْ يُقَاتِلُوا قَوْمَهُمْ ۚ وَلَوْ شَاءَ اللَّهُ لَسَلَّطَهُمْ عَلَيْكُمْ فَلَقَاتَلُوكُمْ ۚ فَإِنِ اعْتَزَلُوكُمْ فَلَمْ يُقَاتِلُوكُمْ وَأَلْقَوْا إِلَيْكُمُ السَّلَمَ فَمَا جَعَلَ اللَّهُ لَكُمْ عَلَيْهِمْ سَبِيلًا

Except those who are belonging to a people with whom there is a treaty exists between you and them, or who came to you as their chests restrain for fighting to you or fighting to their own people. If Lord Allah had so wished, He would have given power upon you, then they would have fought. So if they keep aloof from you, and don’t fight to you, and give guarantee of peace into you, then Allah hasn’t given for you any way upon them.