Muhammad Habib Shakir: Until when he reached the place where the sun set, he found it going down into a black sea, and found by it a people. We said: O Zulqarnain! either give them a chastisement or do them a benefit.
Abdullah Yusuf Ali: Until, when he reached the setting of the sun, he found it set in a spring of murky water: Near it he found a People: We said: "O Zul-qarnain! (thou hast authority,) either to punish them, or to treat them with kindness."
M.Pickthall: Till, when he reached the setting-place of the sun, he found it setting in a muddy spring, and found a people thereabout. We said: O Dhu´l-Qarneyn! Either punish or show them kindness.
Amatul Rahmân Omer: So that when he reached (the land of) the setting of the sun, (the western most part of his empire,) he found it (- the sun) disappearing (as if) in a vast muddy pool of murky water (- the Black Sea), and close to it he found a certain people. We said, `Dhul-Qarnain! you may either punish (them) or treat them with kindness. (They being at your disposal.)´