Al-Baqara • BN-TAFSEER-IBN-E-KASEER
﴿ وَإِذَا قِيلَ لَهُمْ ءَامِنُوا۟ بِمَآ أَنزَلَ ٱللَّهُ قَالُوا۟ نُؤْمِنُ بِمَآ أُنزِلَ عَلَيْنَا وَيَكْفُرُونَ بِمَا وَرَآءَهُۥ وَهُوَ ٱلْحَقُّ مُصَدِّقًۭا لِّمَا مَعَهُمْ ۗ قُلْ فَلِمَ تَقْتُلُونَ أَنۢبِيَآءَ ٱللَّهِ مِن قَبْلُ إِن كُنتُم مُّؤْمِنِينَ ﴾
“For when they are told, "Believe in what God has bestowed from on high," they reply, "We believe [only] in what has been bestowed on us"-and they deny the truth of everything else, although it be a truth confirming the one already in their possession. Say "Why, then, did you slay God's prophets aforetime, if you were (truly] believers?"”
Please check ayah 2:92 for complete tafsir.