The word(s) "betray" appears 3 time(s) in 3 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) We have sent down to thee the Book in truth, that thou mightest judge between men, as guided by Allah: so be not (used) as an advocate by those who betray their trust;

(سورة النساء, An-Nisaa, Chapter #4, Verse #105)
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(2) Contend not on behalf of such as betray their own souls; for Allah loveth not one given to perfidy and crime:

(سورة النساء, An-Nisaa, Chapter #4, Verse #107)
(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)

(3) O ye that believe! betray not the trust of Allah and the Messenger, nor misappropriate knowingly things entrusted to you.

(سورة الأنفال, Al-Anfaal, Chapter #8, Verse #27)
(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)