Chapter 21: The Book on Military Expeditions

Narrated Ibn 'Asim Al-Muzani: 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.'"
Jami at-Tirmidhi 1549
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