Quran 8:28 from Surah Al-Anfaal on Divine Marvels.
وَٱعۡلَمُوٓاْ أَنَّمَآ أَمۡوَٰلُكُمۡ وَأَوۡلَٰدُكُمۡ فِتۡنَةٞ وَأَنَّ ٱللَّهَ عِندَهُۥٓ أَجۡرٌ عَظِيمٞ
English translation: And know that your wealth and your children (are) a trial And that Allah with Him (is) a reward great
Transliteration: wa-i'lamu annama amwalukum wa-awladukum fit'natun wa-anna al-laha indahu ajrun azimun