Surah Yusuf 12:22

وَلَمَّا بَلَغَ أَشُدَّهُۥٓ ءَاتَيْنَـٰهُ حُكْمًا وَعِلْمًا ۚ وَكَذَٰلِكَ نَجْزِى ٱلْمُحْسِنِينَ

And when he [i.e., Joseph] reached maturity, We gave him judgement and knowledge. And thus We reward the doers of good.

Translation: Saheeh International

Tafsir

And when he reached his prime — which was at 30 or 33 years of age — We gave him power of judgement wisdom and knowledge understanding in matters of religion before his call to prophethood. Thus just as We rewarded him We reward those who are virtuous to the good of their souls.

Excerpt from Tafsir al-Jalalayn, commentary on 12:22, via Quran.com. The reader has the full commentary and 9 more tafsirs.