Sura al-Baqara 2:251

فَهَزَمُوهُم بِإِذْنِ ٱللَّـهِ وَقَتَلَ دَاوُۥدُ جَالُوتَ وَءَاتَىٰهُ ٱللَّـهُ ٱلْمُلْكَ وَٱلْحِكْمَةَ وَعَلَّمَهُۥ مِمَّا يَشَآءُ وَلَوْلَا دَفْعُ ٱللَّـهِ ٱلنَّاسَ بَعْضَهُم بِبَعْضٍ لَّفَسَدَتِ ٱلْأَرْضُ وَلَٰكِنَّ ٱللَّـهَ ذُو فَضْلٍ عَلَى ٱلْعَٰلَمِينَ

fa-hazamūhum bi-idhni allāhi wa-qatala dāwudu jālūta wa-ātahu allāhu l-mulka wa-l-ḥikmata wa-ʿallamahu mimmā yashāʾu wa-lawlā dafʿu allāhi l-nāsa baʿḍahum bi-baʿḍin la-fasadati l-arḍu wa-lākinna allāha dhū faḍlin ʿalā l-ʿālamīna

By Allah's will they routed them; and David slew Goliath; and Allah gave him power and wisdom and taught him whatever (else) He willed. And did not Allah Check one set of people by means of another, the earth would indeed be full of mischief: But Allah is full of bounty to all the worlds.