The word(s) "pervert" appears 4 time(s) in 4 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) Can ye (o ye men of Faith) entertain the hope that they will believe in you?- Seeing that a party of them heard the Word of Allah, and perverted it knowingly after they understood it.

(سورة البقرة, Al-Baqara, Chapter #2, Verse #75)
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(2) If any turn back after this, they are perverted transgressors.

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #82)
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(3) Ye are the best of peoples, evolved for mankind, enjoining what is right, forbidding what is wrong, and believing in Allah. If only the People of the Book had faith, it were best for them: among them are some who have faith, but most of them are perverted transgressors.

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #110)
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(4) Those who pervert the Truth in Our Signs are not hidden from Us. Which is better?- he that is cast into the Fire, or he that comes safe through, on the Day of Judgment? Do what ye will: verily He seeth (clearly) all that ye do.

(سورة فصلت, Fussilat, Chapter #41, Verse #40)
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