Surah Al-Kahf 18:66

قَالَ لَهُۥ مُوسَىٰ هَلْ أَتَّبِعُكَ عَلَىٰٓ أَن تُعَلِّمَنِ مِمَّا عُلِّمْتَ رُشْدًا

Moses said to him, "May I follow you on [the condition] that you teach me from what you have been taught of sound judgement?"

Translation: Saheeh International

Tafsir

Moses said to him ‘May I follow you for the purpose that you teach me of what you have been taught in the way of probity?’ namely something of right conduct through which I might be rightly-guided a variant reading for rashadan has rushdan ‘probity’; …

Excerpt from Tafsir al-Jalalayn, commentary on 18:66, via Quran.com. The reader has the full commentary and 9 more tafsirs.