The Holy Quran 18:60 — Surah Al-Kahf
Arabic text
وَإِذْ قَالَ مُوسَىٰ لِفَتَىٰهُ لَآ أَبْرَحُ حَتَّىٰٓ أَبْلُغَ مَجْمَعَ ٱلْبَحْرَيْنِ أَوْ أَمْضِىَ حُقُبًا
Translation
(Remember the time) When Moosa عليه الصلاة والسلام said to the youngster (Yusha bin Noon), "I shall continue to walk until I reach the confluence (meeting) of two seas (the place where two seas meet) or until I pass a long period (in search of Khidr)."
Tafsir (excerpt) — Tafsir Usmani
The real reason for the story of Musa ﵇ and Khidr ﵇: it was mentioned above that the arrogant disbelievers, despising the poor Muslims, used to say to the Prophet ﷺ that he should not seat them near him: “Then we will sit [with you].” On this occasion the parable of the two men was related.
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