The word(s) "pérfido" appears 4 time(s) in 4 verse(s) in Quran in Portuguese (Prof. Samir El-Hayek) translation.

(1) Realmente, revelamos-te o Livro, a fim de que julgues entre os humanos, segundo o que Deus te ensinou. Não sejasdefensor dos pérfidos.

(سورة النساء, An-Nisaa, Chapter #4, Verse #105)
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(2) Não advogues por aqueles que enganaram a si mesmos, porque Deus não aprecia o pérfido, pecador.

(سورة النساء, An-Nisaa, Chapter #4, Verse #107)
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(3) Em verdade, Deus defende os fiéis, porque Deus não aprecia nenhum pérfido e ingrato.

(سورة الحج, Al-Hajj, Chapter #22, Verse #38)
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(4) E quando as ondas montanhas tenebrosas, os envolvem, invocam sinceramente Deus e, tão logo Ele os põe a salvo, emterra, eis que alguns deles vacilam; entretanto, ninguém nega os Nossos versículos, além do pérfido, ingrato.

(سورة لقمان, Luqman, Chapter #31, Verse #32)
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