Quran 10:19 from Surah Yunus on Divine Marvels.
وَمَا كَانَ ٱلنَّاسُ إِلَّآ أُمَّةٗ وَٰحِدَةٗ فَٱخۡتَلَفُواْۚ وَلَوۡلَا كَلِمَةٞ سَبَقَتۡ مِن رَّبِّكَ لَقُضِيَ بَيۡنَهُمۡ فِيمَا فِيهِ يَخۡتَلِفُونَ
English translation: And not was the mankind but a community one then they differed And had (it) not been a word (that) preceded from your Lord surely, it (would) have been judged between them concerning what [therein] they differ
Transliteration: wama kana al-nasu illa ummatan wahidatan fa-ikh'talafu walawla kalimatun sabaqat min rabbika laqudiya baynahum fima fihi yakhtalifuna