20:133
وَقَالُوا۟ لَوْلَا يَأْتِينَا بِـَٔايَةٍ مِّن رَّبِّهِۦٓ ۚ أَوَلَمْ تَأْتِهِم بَيِّنَةُ مَا فِى ٱلصُّحُفِ ٱلْأُولَىٰ
And they say, "Why does he not bring us a sign from his Lord?" Has there not come to them evidence of what was in the former scriptures?
Context in Surah Ta-Ha
Nearby ayahs help place verse 20:133 in sequence and meaning.
وَلَا تَمُدَّنَّ عَيْنَيْكَ إِلَىٰ مَا مَتَّعْنَا بِهِۦٓ أَزْوَٰجًا مِّنْهُمْ زَهْرَةَ ٱلْحَيَوٰةِ ٱلدُّنْيَا لِنَفْتِنَهُمْ فِيهِ ۚ وَرِزْقُ رَبِّكَ خَيْرٌ وَأَبْقَىٰ
And do not extend your eyes toward that by which We have given enjoyment to [some] categories of them, [its being but] the splendor of worldly life by which We test them. And the provision of your Lord is better and more enduring.
وَأْمُرْ أَهْلَكَ بِٱلصَّلَوٰةِ وَٱصْطَبِرْ عَلَيْهَا ۖ لَا نَسْـَٔلُكَ رِزْقًا ۖ نَّحْنُ نَرْزُقُكَ ۗ وَٱلْعَـٰقِبَةُ لِلتَّقْوَىٰ
And enjoin prayer upon your family [and people] and be steadfast therein. We ask you not for provision; We provide for you, and the [best] outcome is for [those of] righteousness.
وَلَوْ أَنَّآ أَهْلَكْنَـٰهُم بِعَذَابٍ مِّن قَبْلِهِۦ لَقَالُوا۟ رَبَّنَا لَوْلَآ أَرْسَلْتَ إِلَيْنَا رَسُولًا فَنَتَّبِعَ ءَايَـٰتِكَ مِن قَبْلِ أَن نَّذِلَّ وَنَخْزَىٰ
And if We had destroyed them with a punishment before him, they would have said, "Our Lord, why did You not send to us a messenger so we could have followed Your verses before we were humiliated and disgraced?"
قُلْ كُلٌّ مُّتَرَبِّصٌ فَتَرَبَّصُوا۟ ۖ فَسَتَعْلَمُونَ مَنْ أَصْحَـٰبُ ٱلصِّرَٰطِ ٱلسَّوِىِّ وَمَنِ ٱهْتَدَىٰ
Say, "Each [of us] is waiting; so wait. For you will know who are the companions of the sound path and who is guided."