Surah Al-Kahf, verse 64

فَلَمَّا جَاوَزَا قَالَ لِفَتَىٰهُ ءَاتِنَا غَدَآءَنَا لَقَدْ لَقِينَا مِن سَفَرِنَا هَـٰذَا نَصَبًۭا ﴿٦٢﴾

So when they had passed beyond it, [Moses] said to his boy, "Bring us our morning meal. We have certainly suffered in this, our journey, [much] fatigue."

قَالَ أَرَءَيْتَ إِذْ أَوَيْنَآ إِلَى ٱلصَّخْرَةِ فَإِنِّى نَسِيتُ ٱلْحُوتَ وَمَآ أَنسَىٰنِيهُ إِلَّا ٱلشَّيْطَـٰنُ أَنْ أَذْكُرَهُۥ ۚ وَٱتَّخَذَ سَبِيلَهُۥ فِى ٱلْبَحْرِ عَجَبًۭا ﴿٦٣﴾

He said, "Did you see when we retired to the rock? Indeed, I forgot [there] the fish. And none made me forget it except Satan - that I should mention it. And it took its course into the sea amazingly."

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?"