Al-Baiyyinah - 98:4

وَمَا تَفَرَّقَ الَّذِينَ أُوتُوا الْكِتَابَ إِلَّا مِن بَعْدِ مَا جَاءتْهُمُ الْبَيِّنَةُ
[98:4]
And those who were given the Book did not become divided except after clear evidence had come to them.
Nor did the People of the Book make schisms, until after there came to them Clear Evidence.
Nor were the People of the Scripture divided until after the clear proof came unto them.