﴿ وَمَا تَفَرَّقَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ إِلَّا مِنۢ بَعْدِ مَا جَآءَتْهُمُ ٱلْبَيِّنَةُ ﴾

“Now those who have been vouchsafed revelation aforetime did break up their unity [of faith] after such an evidence of the truth had come to them.”

Please check ayah 98:5 for complete tafsir.