﴿ 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?"”

Please check ayah 18:70 for complete tafsir.