Ash-Shuraa 42:14 وما تفرقوا الا من بعد ما جاءهم العلم بغيا بينهم ولولا كلمة سبقت من ربك الى اجل مسمى لقضي بينهم وان الذين اورثوا الكتاب من بعدهم لفي شك منه مريب ١٤

And they divided not till after knowledge had come to them, through (selfish) transgression between themselves. And had it not been for a Word that went forth before from your Lord for an appointed term, the matter would have been settled between them. And verily, those who were made to inherit the Scripture [i.e. the Taurâh (Torah) and the Injeel (Gospel)] after them (i.e. Jews and Christians) are in grave doubt concerning it (i.e. Allâh’s true religion - Islâm or the Qur’ân).