Surah Al-Baqarah 2:250

وَلَمَّا بَرَزُوا۟ لِجَالُوتَ وَجُنُودِهِۦ قَالُوا۟ رَبَّنَآ أَفْرِغْ عَلَيْنَا صَبْرًا وَثَبِّتْ أَقْدَامَنَا وَٱنصُرْنَا عَلَى ٱلْقَوْمِ ٱلْكَـٰفِرِينَ

And when they went forth to [face] Goliath and his soldiers, they said, "Our Lord, pour upon us patience and plant firmly our feet and give us victory over the disbelieving people."

Translation: Saheeh International

Tafsir

So when they went forth against Goliath and his troops facing them in military columns they said ‘Our Lord pour out upon us patience and make firm our feet by strengthening our hearts for this struggle and grant us victory over the disbelieving folk!’

Excerpt from Tafsir al-Jalalayn, commentary on 2:250, via Quran.com. The reader has the full commentary and 9 more tafsirs.