It wasnarrated from 'Uqbah bin 'Amir Al-Juhani that the Messenger ofAllah (ﷺ) said:
"May Allah have mercy on the one who keeps watchover the troops." (JA)
English reference (JA): Vol. 4, Book 24, Hadith 2769 (JA)
Arabic reference (JA): Book 24, Hadith 2874 (JA)