Example in the Quran

وَإِذَا قِيلَ لَهُمۡ ءَامِنُواْ بِمَآ أَنزَلَ ٱللَّهُ قَالُواْ نُؤۡمِنُ بِمَآ أُنزِلَ عَلَيۡنَا وَيَكۡفُرُونَ بِمَا وَرَآءَهُۥ وَهُوَ ٱلۡحَقُّ مُصَدِّقٗا لِّمَا مَعَهُمۡۗ قُلۡ فَلِمَ تَقۡتُلُونَ أَنۢبِيَآءَ ٱللَّهِ مِن قَبۡلُ إِن كُنتُم مُّؤۡمِنِينَ

When it is said to them: “Believe in what Allah has revealed,” they reply, “We only believe in what was sent down to us,” and they deny what came afterwards, though it is the truth confirming their own Scriptures! Ask ˹them, O Prophet˺, “Why then did you kill Allah’s prophets before, if you are ˹truly˺ believers?”