فَإِن آمَنوا بِمِثلِ ما آمَنتُم بِهِ فَقَدِ اهتَدَوا ۖ وَإِن تَوَلَّوا فَإِنَّما هُم في شِقاقٍ ۖ فَسَيَكفيكَهُمُ اللَّهُ ۚ وَهُوَ السَّميعُ العَليمُ

If they believe as you believe, then they are guided. But if they turn away, they are in schism. God will be sufficient for you against them. He is the All-Hearing, the All-Knowing.