The word(s) "difamarem" appears 3 time(s) in 3 verse(s) in Quran in Portuguese (Prof. Samir El-Hayek) translation.

(1) Porém, se depois de haverem feito o tratado convosco, perjurarem e difamarem a vossa religião, combatei os chefesincrédulos, pois são perjuros; talvez se refreiem.

(سورة التوبة, At-Tawba, Chapter #9, Verse #12)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) E àqueles que difamarem as mulheres castas, sem apresentarem quatro testemunhas, infligi-lhes oitenta vergastadas enunca mais aceiteis os seus testemunhos, porque são depravados.

(سورة النور, An-Noor, Chapter #24, Verse #4)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(3) Em verdade, aqueles que difamarem as mulheres castas, inocentes e fiéis, serão malditos, neste mundo e no outro, esofrerão um severo castigo.

(سورة النور, An-Noor, Chapter #24, Verse #23)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)