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).”

English translation · Jami' at-Tirmidhi