Ruler appointing leaders of expeditions and advising them of the etiquette of war, etc. Sahih Muslim 1731 d
Arabic hadith text
حَدَّثَنَا إِبْرَاهِيمُ، حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الْوَهَّابِ الْفَرَّاءُ، عَنِ الْحُسَيْنِ بْنِ الْوَلِيدِ، عَنْ شُعْبَةَ، بِهَذَا
Translation
This hadith has been transmitted on the authority of Shu'ba.