Sunan Ibn Majah
2826
Sahih+2

It was narrated that Ibn ‘Umar said:“When the Messenger of Allah (ﷺ) would dispatch troops, he would say to the leader: ‘I commend to Allah’s keeping your religious commitment, your dignity and the end of your deeds.’”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi