The word(s) "unhappy" appears 2 time(s) in 2 verse(s) in Quran in Saheeh International translation.

(1) He said, "My Lord, indeed my bones have weakened, and my head has filled with white, and never have I been in my supplication to You, my Lord, unhappy.

(سورة مريم, Maryam, Chapter #19, Verse #4)
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(2) And I will leave you and those you invoke other than Allah and will invoke my Lord. I expect that I will not be in invocation to my Lord unhappy."

(سورة مريم, Maryam, Chapter #19, Verse #48)
(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)