Surah Al-Kahf — Ayah 60 (18:60)
وَإِذۡ قَالَ مُوسَىٰ لِفَتَىٰهُ لَآ أَبۡرَحُ حَتَّىٰٓ أَبۡلُغَ مَجۡمَعَ ٱلۡبَحۡرَيۡنِ أَوۡ أَمۡضِيَ حُقُبٗا ٦٠
English translation (Saheeh International)
And [mention] when Moses said to his boy [i.e., servant], "I will not cease [traveling] until I reach the junction of the two seas or continue for a long period."
Brief commentary
Remember - O Messenger - when Moses (peace be upon him) said to his servant, Joshua the son of Nun: I will continue travelling until I reach the place where the two seas meet, or I will travel until such time that I meet the righteous servant and I learn from him.