Quran 2:250 from Surah Al-Baqara on Divine Marvels.
وَلَمَّا بَرَزُواْ لِجَالُوتَ وَجُنُودِهِۦ قَالُواْ رَبَّنَآ أَفۡرِغۡ عَلَيۡنَا صَبۡرٗا وَثَبِّتۡ أَقۡدَامَنَا وَٱنصُرۡنَا عَلَى ٱلۡقَوۡمِ ٱلۡكَٰفِرِينَ
English translation: And when they went forth to (face) Jalut and his troops they said Our Lord Pour on us patience and make firm our feet and help us against the people (who are) disbelieving
Transliteration: walamma barazu lijaluta wajunudihi qalu rabbana afrigh alayna sabran wathabbit aqdamana wa-unsur'na ala al-qawmi al-kafirina