Rules of engagement and warfare

وَإِنْ أَحَدٌ مِّنَ ٱلْمُشْرِكِينَ ٱسْتَجَارَكَ فَأَجِرْهُ حَتَّىٰ يَسْمَعَ كَلَـٰمَ ٱللَّهِ ثُمَّ أَبْلِغْهُ مَأْمَنَهُۥ ۚ ذَٰلِكَ بِأَنَّهُمْ قَوْمٌ لَّا يَعْلَمُونَ

And if any one of the polytheists seeks your protection, then grant him protection so that he may hear the words of Allāh [i.e., the Qur’ān]. Then deliver him to his place of safety. That is because they are a people who do not know.