﴿ قَالَ لَهُۥ مُوسَىٰ هَلْ أَتَّبِعُكَ عَلَىٰٓ أَن تُعَلِّمَنِ مِمَّا عُلِّمْتَ رُشْدًۭا ﴾

“Moses said unto him: "May I follow thee on the understanding that thou wilt impart to me something of that consciousness of what is right which has been imparted to thee?"”

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’; he asked him this because to increase one’s knowledge is something which is always sought.