And (remember) when Musa (Moses) said to his boy-servant: "I will not give up (travelling) until I reach the junction of the two seas or (until) I spend years and years in travelling."

But when they reached the junction of the two seas, they forgot their fish, and it took its way through the sea as in a tunnel.

So when they had passed further on (beyond that fixed place), Musa (Moses) said to his boy-servant: "Bring us our morning meal; truly, we have suffered much fatigue in this, our journey."

He said:"Do you remember when we betook ourselves to the rock? I indeed forgot the fish, none but Shaitan (Satan) made me forget to remember it. It took its course into the sea in a strange (way)!"

[Musa (Moses)] said: "That is what we have been seeking." So they went back retracing their footsteps.

Then they found one of Our slaves, unto whom We had bestowed mercy from Us, and whom We had taught knowledge from Us.

Musa (Moses) said to him (Khidr) "May I follow you so that you teach me something of that knowledge (guidance and true path) which you have been taught (by Allah)?"

He (Khidr) said: "Verily! You will not be able to have patience with me!

"And how can you have patience about a thing which you know not?"

Musa (Moses) said: "If Allah will, you will find me patient, and I will not disobey you in aught."

He (Khidr) said: "Then, if you follow me, ask me not about anything till I myself mention it to you."