Al-Baqarah 2:91

Wa-itha qeela lahum aminoo bimaanzala Allahu qaloo nu/minu bima onzilaAAalayna wayakfuroona bima waraahu wahuwa alhaqqumusaddiqan lima maAAahum qul falima taqtuloonaanbiyaa Allahi min qablu in kuntum mu/mineen

And when it is said to them, "Believe in what Allāh has revealed," they say, "We believe [only] in what was revealed to us." And they disbelieve in what came after it, while it is the truth confirming that which is with them. Say, "Then why did you kill the prophets of Allāh before, if you are [indeed] believers?"

When it is said to them, “Believe in what Allah has revealed,” they say, “We believe in what has been revealed to us” - and they deny what is beyond it, whereas that is the truth which confirms what is with them. Say, “Why then have you been slaying the prophets of Allah earlier, if you were believers?”