The word(s) "unjustly" appears 3 time(s) in 3 verse(s) in Quran in Muhammad Pickthal translation.

(1) Then will it be said unto those who dealt unjustly Taste the torment of eternity. Are ye requited aught save what ye used to earn?

(سورة يونس, Yunus, Chapter #10, Verse #52)
(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) How many a community that dealt unjustly have We shattered, and raised up after them another folk!

(سورة الأنبياء, Al-Anbiyaa, Chapter #21, Verse #11)
(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) Those who have been driven from their homes unjustly only because they said: Our Lord is Allah - For had it not been for Allah's repelling some men by means of others, cloisters and churches and oratories and mosques, wherein the name of Allah is oft mentioned, would assuredly have been pulled down. Verily Allah helpeth one who helpeth Him. Lo! Allah is Strong, Almighty -

(سورة الحج, Al-Hajj, Chapter #22, Verse #40)
(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)