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

(1) They believe in Allah and the Last Day; they enjoin what is right, and forbid what is wrong; and they hasten (in emulation) in (all) good works: They are in the ranks of the righteous.

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #114)
(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) So We listened to him: and We granted him Yahya: We cured his wife's (Barrenness) for him. These (three) were ever quick in emulation in good works; they used to call on Us with love and reverence, and humble themselves before Us.

(سورة الأنبياء, Al-Anbiyaa, Chapter #21, Verse #90)
(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)