Du'a for victory and success

رَّبِّ أَدۡخِلۡنِي مُدۡخَلَ صِدۡقࣲ وَأَخۡرِجۡنِي مُخۡرَجَ صِدۡقࣲ وَٱجۡعَل لِّي مِن لَّدُنكَ سُلۡطَٰنࣰا نَّصِيرࣰا

Rabbi adkhilnee mudkhala sidqin wa akhrijnee mukhraja sidqin waj'al lee mil ladunka sultaanan naseeraa

My Lord! Cause me to come in with a firm incoming and to go out with a firm outgoing. And give me from Thy presence a sustaining Power

Qur'an 17:80 (Al-Isra)