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  

From his father and he was a Companion who said: "When the Messenger of Allah ﷺ dispatched any army or battalion, he would say to them: 'If you see a Masjid, or hear someone calling the Adhan, then do not kill anyone.'"  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا بَعَثَ جَيْشًا أَوْ سَرِيَّةً يَقُولُ لَهُمْ إِذَا رَأَيْتُمْ مَسْجِدًا أَوْ سَمِعْتُمْ مُؤَذِّنًا فَلاَ تَقْتُلُوا أَحَدًا  

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. (Using translation from Abū Dāʾūd 2635)   

كَانَ رَسُولُ اللهِ ﷺ إِذَا بَعَثَ سَرِيَّةً قَالَ «إِنْ رَأَيْتُمْ مَسْجِدًا أَوْ سَمِعْتُمْ مُؤَذِّنًا فَلَا تَقْتُلُوا أَحَدًا»  

From his father and he was a Companion who said: "When the Messenger of Allah ﷺ dispatched any army or battalion, he would say to them: 'If you see a Masjid, or hear someone calling the Adhan, then do not kill anyone.'" (Using translation from Tirmidhī 1549)   

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا بَعَثَ سَرِيَّةً قَالَ إِذَا سَمِعْتُمْ مُؤَذِّنًا أَوْ رَأَيْتُمْ مَسْجِدًا فَلَا تَقْتُلُوا أَحَدًا  

From his father and he was a Companion who said: "When the Messenger of Allah ﷺ dispatched any army or battalion, he would say to them: 'If you see a Masjid, or hear someone calling the Adhan, then do not kill anyone.'" (Using translation from Tirmidhī 1549)   

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا بَعَثَ سَرِيَّةً قَالَ إِذَا سَمِعْتُمْ مُؤَذِّنًا أَوْ رَأَيْتُمْ مَسْجِدًا فَلَا تَقْتُلُوا أَحَدًا