Surat Al-Kahf (The Cave) - سورة الكهف

: 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."

: So they both proceeded, till, when they embarked the ship, he (Khidr) scuttled it. Musa (Moses) said: "Have you scuttled it in order to drown its people? Verily, you have committed a thing "Imra" (a Munkar - evil, bad, dreadful thing)."

: He (Khidr) said: "Did I not tell you, that you would not be able to have patience with me?"