The word(s) "murky" appears 3 time(s) in 3 verse(s) in Quran in Saheeh International translation.

(1) And say, "The truth is from your Lord, so whoever wills - let him believe; and whoever wills - let him disbelieve." Indeed, We have prepared for the wrongdoers a fire whose walls will surround them. And if they call for relief, they will be relieved with water like murky oil, which scalds [their] faces. Wretched is the drink, and evil is the resting place.

(سورة الكهف, Al-Kahf, Chapter #18, Verse #29)
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(2) Like murky oil, it boils within bellies

(سورة الدخان, Ad-Dukhaan, Chapter #44, Verse #45)
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(3) On the Day the sky will be like murky oil,

(سورة المعارج, Al-Ma'aarij, Chapter #70, Verse #8)
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