The word(s) "earnestness" appears 2 time(s) in 2 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) The Hypocrites - they think they are over-reaching Allah, but He will over-reach them: When they stand up to prayer, they stand without earnestness, to be seen of men, but little do they hold Allah in remembrance;

(سورة النساء, An-Nisaa, Chapter #4, Verse #142)
(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) The only reasons why their contributions are not accepted are: that they reject Allah and His Messenger; that they come to prayer without earnestness; and that they offer contributions unwillingly.

(سورة التوبة, At-Tawba, Chapter #9, Verse #54)
(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)