وَلَمّا بَلَغَ أَشُدَّهُ وَاستَوىٰ آتَيناهُ حُكمًا وَعِلمًا ۚ وَكَذٰلِكَ نَجزِي المُحسِنينَ

When he reached his full strength and was mature, We endowed him with wisdom and knowledge. This is how We reward the righteous.