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

(1) O ye who believe! If ye listen to a faction among the People of the Book, they would (indeed) render you apostates after ye have believed!

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #100)
(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) Those who turn back as apostates after Guidance was clearly shown to them,- the Evil One has instigated them and busied them up with false hopes.

(سورة محمد, Muhammad, Chapter #47, Verse #25)
(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)