Surah Al-Kahf, verse 67

فَوَجَدَا عَبْدًۭا مِّنْ عِبَادِنَآ ءَاتَيْنَـٰهُ رَحْمَةًۭ مِّنْ عِندِنَا وَعَلَّمْنَـٰهُ مِن لَّدُنَّا عِلْمًۭا ﴿٦٥﴾

And they found a servant from among Our servants [i.e., al-Khiḍr] to whom We had given mercy from Us and had taught him from Us a [certain] knowledge.

قَالَ لَهُۥ مُوسَىٰ هَلْ أَتَّبِعُكَ عَلَىٰٓ أَن تُعَلِّمَنِ مِمَّا عُلِّمْتَ رُشْدًۭا ﴿٦٦﴾

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

وَكَيْفَ تَصْبِرُ عَلَىٰ مَا لَمْ تُحِطْ بِهِۦ خُبْرًۭا ﴿٦٨﴾

And how can you have patience for what you do not encompass in knowledge?"

قَالَ سَتَجِدُنِىٓ إِن شَآءَ ٱللَّهُ صَابِرًۭا وَلَآ أَعْصِى لَكَ أَمْرًۭا ﴿٦٩﴾

[Moses] said, "You will find me, if Allāh wills, patient, and I will not disobey you in [any] order."