Surah Al-Baqarah 2:137

فَإِنْ ءَامَنُوا۟ بِمِثْلِ مَآ ءَامَنتُم بِهِۦ فَقَدِ ٱهْتَدَوا۟ ۖ وَّإِن تَوَلَّوْا۟ فَإِنَّمَا هُمْ فِى شِقَاقٍ ۖ فَسَيَكْفِيكَهُمُ ٱللَّهُ ۚ وَهُوَ ٱلسَّمِيعُ ٱلْعَلِيمُ

So if they believe in the same as you believe in, then they have been [rightly] guided; but if they turn away, they are only in dissension, and Allāh will be sufficient for you against them. And He is the Hearing, the Knowing.

Translation: Saheeh International

Tafsir

And if they the Jews and the Christians believe in the like mithl ‘the like’ is extra of what you believe in then they are truly guided; but if they turn away from belief in it then they are clearly in schism in opposition to you; God will suffice you O Muhammad (s) against them and their schisms; …

Excerpt from Tafsir al-Jalalayn, commentary on 2:137, via Quran.com. The reader has the full commentary and 9 more tafsirs.