Read Ruku 260 of the Quran

وَإِذْ قَالَ مُوسَىٰ لِفَتَىٰهُ لَآ أَبْرَحُ حَتَّىٰٓ أَبْلُغَ مَجْمَعَ ٱلْبَحْرَيْنِ أَوْ أَمْضِىَ حُقُبًۭا ﴿60﴾

And [mention] when Moses said to his servant, "I will not cease [traveling] until I reach the junction of the two seas or continue for a long period."

فَلَمَّا بَلَغَا مَجْمَعَ بَيْنِهِمَا نَسِيَا حُوتَهُمَا فَٱتَّخَذَ سَبِيلَهُۥ فِى ٱلْبَحْرِ سَرَبًۭا ﴿61﴾

But when they reached the junction between them, they forgot their fish, and it took its course into the sea, slipping away.

فَلَمَّا جَاوَزَا قَالَ لِفَتَىٰهُ ءَاتِنَا غَدَآءَنَا لَقَدْ لَقِينَا مِن سَفَرِنَا هَـٰذَا نَصَبًۭا ﴿62﴾

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 ﴿63﴾

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".

قَالَ ذَٰلِكَ مَا كُنَّا نَبْغِ ۚ فَٱرْتَدَّا عَلَىٰٓ ءَاثَارِهِمَا قَصَصًۭا ﴿64﴾

[Moses] said, "That is what we were seeking." So they returned, following their footprints.

فَوَجَدَا عَبْدًۭا مِّنْ عِبَادِنَآ ءَاتَيْنَـٰهُ رَحْمَةًۭ مِّنْ عِندِنَا وَعَلَّمْنَـٰهُ مِن لَّدُنَّا عِلْمًۭا ﴿65﴾

And they found a servant from among Our servants 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 ﴿66﴾

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

قَالَ إِنَّكَ لَن تَسْتَطِيعَ مَعِىَ صَبْرًۭا ﴿67﴾

He said, "Indeed, with me you will never be able to have patience.

وَكَيْفَ تَصْبِرُ عَلَىٰ مَا لَمْ تُحِطْ بِهِۦ خُبْرًۭا ﴿68﴾

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

قَالَ سَتَجِدُنِىٓ إِن شَآءَ ٱللَّهُ صَابِرًۭا وَلَآ أَعْصِى لَكَ أَمْرًۭا ﴿69﴾

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

قَالَ فَإِنِ ٱتَّبَعْتَنِى فَلَا تَسْـَٔلْنِى عَن شَىْءٍ حَتَّىٰٓ أُحْدِثَ لَكَ مِنْهُ ذِكْرًۭا ﴿70﴾

He said, "Then if you follow me, do not ask me about anything until I make to you about it mention."