Ash-Shuraa 42:14

وَمَا تَفَرَّقُوٓا۟ إِلَّا مِنۢ بَعْدِ مَا جَآءَهُمُ ٱلْعِلْمُ بَغْيًۢا بَيْنَهُمْ ۚ وَلَوْلَا كَلِمَةٌ سَبَقَتْ مِن رَّبِّكَ إِلَىٰٓ أَجَلٍ مُّسَمًّى لَّقُضِىَ بَيْنَهُمْ ۚ وَإِنَّ ٱلَّذِينَ أُورِثُوا۟ ٱلْكِتَـٰبَ مِنۢ بَعْدِهِمْ لَفِى شَكٍّ مِّنْهُ مُرِيبٍ

Wamā tafarraqū illā min baʿdi mā jāahumu l-ʿil'mu baghyan baynahum walawlā kalimatun sabaqat min rabbika ilā ajalin musamman laquḍiya baynahum wa-inna alladhīna ūrithū l-kitāba min baʿdihim lafī shakkin min'hu murībin

And they did not become divided until after knowledge had come to them - out of jealous animosity between themselves. And if not for a word¹ that preceded from your Lord [postponing the penalty] until a specified time, it would have been concluded between them. And indeed, those who were granted inheritance of the Scripture after them are, concerning it, in disquieting doubt.