The word(s) "foul" appears 1 time(s) in 1 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) Then they proceeded: until, when they met a young man, he slew him. Moses said: "Hast thou slain an innocent person who had slain none? Truly a foul (unheard of) thing hast thou done!"

(سورة الكهف, Al-Kahf, Chapter #18, Verse #74)
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