(122) باب فِي الدُّعَاءِ إِذَا غَزَا
Anas narrated that when the Prophet (ﷺ) would go out for an expedition, he would say:
"O Allah, You are my `Aḍud and You are my Helper, and by You do I fight (Allāhumma anta `aḍudī, wa anta naṣīrī, wa bika uqātil)."
Reference: Jami` at-Tirmidhi 3584
In-book reference: Book 48, Hadith 215
English translation: Vol. 6, Book 46, Hadith 3584