Quran 3:157 from Surah Aal-i-Imraan on Divine Marvels.
وَلَئِن قُتِلۡتُمۡ فِي سَبِيلِ ٱللَّهِ أَوۡ مُتُّمۡ لَمَغۡفِرَةٞ مِّنَ ٱللَّهِ وَرَحۡمَةٌ خَيۡرٞ مِّمَّا يَجۡمَعُونَ
English translation: And if you are killed in (the) way (of) Allah or die[d] certainly forgiveness from Allah and Mercy (are) better than what they accumulate
Transliteration: wala-in qutil'tum fi sabili al-lahi aw muttum lamaghfiratun mina al-lahi warahmatun khayrun mimma yajma'una