The Cave - 18:60
"Moses said to his young companion, "I will not rest until I reach the confluence of the two seas, even if it requires years of walking."
Related:
Ta-Ha/20:40
Remember when your sister went and said, ´Shall I show you someone to take care of him? So We returned you to your mother so that her eyes would be enlightened and she would not grieve. Even when you had killed a man, We saved you from sorrow and put you through various tests. Now you have come back, Moses, after many years among the people of Medina, according to a definite plan.