Surah Al-Anfal, Verse 45

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓاْ إِذَا لَقِيتُمۡ فِئَةٗ فَٱثۡبُتُواْ وَٱذۡكُرُواْ ٱللَّهَ كَثِيرٗا لَّعَلَّكُمۡ تُفۡلِحُونَ٤٥

yāayyuhā alladhīna āmanū idhā laqītum fi-atan fa-uth'butū wa-udh'kurū l-laha kathīran laʿallakum tuf'liḥūna

O you who have believed, when you encounter a company [from the enemy forces], stand firm and remember Allāh much that you may be successful.