Taha Ayah 133

وَقَالُواْ لَوْلَا يَأْتِينَا بِـَٔـايَةٍ مِّن رَّبِّهِۦٓ‌ۚ أَوَلَمْ تَأْتِهِم بَيِّنَةُ مَا فِى ٱلصُّحُفِ ٱلْأُولَىٰ ١٣٣ They demand, “If only he could bring us a sign from his Lord!” Have they not ?already? received a confirmation of what is in earlier Scriptures?