The word(s) "ill-luck" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) But when good befell them they said: This is due to us; and when evil afflicted them, they attributed it to the ill-luck of Musa and those with him; surely their evil fortune is only from Allah but most of them do not know.

(سورة الأعراف, Al-A'raaf, Chapter #7, Verse #131)
(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) Surely We sent on them a tornado in a day of bitter ill-luck

(سورة القمر, Al-Qamar, Chapter #54, Verse #19)
(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)