إِنَّ فِى خَلْقِ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ وَٱخْتِلَـٰفِ ٱلَّيْلِ وَٱلنَّهَارِ لَـَٔايَـٰتٍ لِّأُو۟لِى ٱلْأَلْبَـٰبِ

Indeed, in the creation of the heavens and the earth and the alternation of the night and the day are signs for those of understanding -

Ali 'Imran 190

وَإِذَا مَآ أُنزِلَتْ سُورَةٌ نَّظَرَ بَعْضُهُمْ إِلَىٰ بَعْضٍ هَلْ يَرَىٰكُم مِّنْ أَحَدٍ ثُمَّ ٱنصَرَفُوا۟ ۚ صَرَفَ ٱللَّهُ قُلُوبَهُم بِأَنَّهُمْ قَوْمٌ لَّا يَفْقَهُونَ

And whenever a sūrah is revealed, they look at each other, [as if saying], "Does anyone see you?" and then they dismiss themselves. Allāh has dismissed their hearts because they are a people who do not understand.

At-Tawbah 127

قُلِ ٱنظُرُوا۟ مَاذَا فِى ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۚ وَمَا تُغْنِى ٱلْـَٔايَـٰتُ وَٱلنُّذُرُ عَن قَوْمٍ لَّا يُؤْمِنُونَ

Say, "Observe what is in the heavens and the earth." But of no avail will be signs or warners to a people who do not believe.

Yunus 101

لَقَدْ كَانَ فِى قَصَصِهِمْ عِبْرَةٌ لِّأُو۟لِى ٱلْأَلْبَـٰبِ ۗ مَا كَانَ حَدِيثًا يُفْتَرَىٰ وَلَـٰكِن تَصْدِيقَ ٱلَّذِى بَيْنَ يَدَيْهِ وَتَفْصِيلَ كُلِّ شَىْءٍ وَهُدًى وَرَحْمَةً لِّقَوْمٍ يُؤْمِنُونَ

There was certainly in their stories a lesson for those of understanding. Never was it [i.e., the Qur’ān] a narration invented, but a confirmation of what was before it and a detailed explanation of all things and guidance and mercy for a people who believe.

Yusuf 111

وَمَآ أَرْسَلْنَا مِن قَبْلِكَ إِلَّا رِجَالًا نُّوحِىٓ إِلَيْهِم مِّنْ أَهْلِ ٱلْقُرَىٰٓ ۗ أَفَلَمْ يَسِيرُوا۟ فِى ٱلْأَرْضِ فَيَنظُرُوا۟ كَيْفَ كَانَ عَـٰقِبَةُ ٱلَّذِينَ مِن قَبْلِهِمْ ۗ وَلَدَارُ ٱلْـَٔاخِرَةِ خَيْرٌ لِّلَّذِينَ ٱتَّقَوْا۟ ۗ أَفَلَا تَعْقِلُونَ

And We sent not before you [as messengers] except men to whom We revealed from among the people of cities. So have they1 not traveled through the earth and observed how was the end of those before them? And the home of the Hereafter is best for those who fear Allāh; then will you not reason?

Yusuf 109