Ibn ‘Awn said “I wrote to Nafi’ asking him about summoning the polytheists (to Islam) at the time of fighting. So, he wrote to me “This was in the early days of Islam. The Prophet of Allaah ﷺ attacked Banu Al Mustaliq while they were inattentive and their cattle were drinking water. So their fighters were killed and the survivors (i.e., women and children) were taken prisoners. On that day Juwairiyyah daughter of Al Harith was obtained. ‘Abd Allaah narrated this to me, he was in that army.” Abu Dawud said “This is a good tradition narrtted by Ibn ‘Awn from Nafi’ and no one shared him in narrating it.”  

عَنْ دُعَاءِ الْمُشْرِكِينَ عِنْدَ الْقِتَالِ فَكَتَبَ إِلَىَّ أَنَّ ذَلِكَ كَانَ فِي أَوَّلِ الإِسْلاَمِ وَقَدْ أَغَارَ نَبِيُّ اللَّهِ ﷺ عَلَى بَنِي الْمُصْطَلِقِ وَهُمْ غَارُّونَ وَأَنْعَامُهُمْ تُسْقَى عَلَى الْمَاءِ فَقَتَلَ مُقَاتِلَتَهُمْ وَسَبَى سَبْيَهُمْ وَأَصَابَ يَوْمَئِذٍ جُوَيْرِيَةَ بِنْتَ الْحَارِثِ حَدَّثَنِي بِذَلِكَ عَبْدُ اللَّهِ وَكَانَ فِي ذَلِكَ الْجَيْشِ  

Anas said “The Prophet ﷺ used to attack at the time of the dawn prayer and hear. If he heard a call to prayer, he would refrain from them, otherwise would attack (them).  

أَنَّ النَّبِيَّ ﷺ كَانَ يُغِيرُ عِنْدَ صَلاَةِ الصُّبْحِ وَكَانَ يَتَسَمَّعُ فَإِذَا سَمِعَ أَذَانًا أَمْسَكَ وَإِلاَّ أَغَارَ  

The Messenger of Allah ﷺ sent us in a detachment and said (to us): If you see a mosque or hear a mu'adhdhin (calling to prayer), do not kill anyone.  

بَعَثَنَا رَسُولُ اللَّهِ ﷺ فِي سَرِيَّةٍ فَقَالَ إِذَا رَأَيْتُمْ مَسْجِدًا أَوْ سَمِعْتُمْ مُؤَذِّنًا فَلاَ تَقْتُلُوا أَحَدًا