Pondering over the Great Creation of Allah, The passing away of Life of the World, the Horrors of the Day of Requital and Laxity of One’s Nafs | Riyad-us-Saliheen

Allah, the Exalted says:

إِنَّمَآ أَعِظُكُم بِوَٰحِدَةٍۖ أَن تَقُومُواْ لِلَّهِ مَثۡنَىٰ وَفُرَٰدَىٰ ثُمَّ تَتَفَكَّرُواْ

“I exhort you to one (thing) only: that you stand up for Allah’s sake in pairs and singly, – and reflect (within yourselves the life history of the Prophet ﷺ)”.

[Saba’ 34:46]

إِنَّ فِي خَلۡقِ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِ وَٱخۡتِلَٰفِ ٱلَّيۡلِ وَٱلنَّهَارِ لَأٓيَٰتٖ لِّأُوْلِي ٱلۡأَلۡبَٰبِ ﴿١٩٠﴾ ٱلَّذِينَ يَذۡكُرُونَ ٱللَّهَ قِيَٰمٗا وَقُعُودٗا وَعَلَىٰ جُنُوبِهِمۡ

“Verily! in the creation of the heavens and the earth, and in the alternation of night and day, there are indeed signs for men of understanding. Those who remember Allah (always, and in prayers) standing, sitting, and lying down on their sides, and think deeply about the creation of the heavens and the earth, (saying): ‘Our Rubb! You have not created (all) this without purpose, glory to You! (Exalted be You above all that they associate with You as partners)”.

[Āl ‘Imrān 3:190–191]

أَفَلَا يَنظُرُونَ إِلَى ٱلۡإِبِلِ كَيۡفَ خُلِقَتۡ ﴿١٧﴾ وَإِلَى ٱلسَّمَآءِ كَيۡفَ رُفِعَتۡ ﴿١٨﴾ وَإِلَى ٱلۡجِبَالِ كَيۡفَ نُصِبَتۡ ﴿١٩﴾ وَإِلَى ٱلۡأَرۡضِ كَيۡفَ سُطِحَتۡ ﴿٢٠﴾ فَذَكِّرۡ إِنَّمَآ أَنتَ مُذَكِّرٞ ﴿٢١﴾

“Do they not look at the camels, how they are created? And at the heaven, how it is raised? And at the mountains, how they are rooted (and fixed firm)? And at the earth, how it is spread out? So remind them (O Muhammad ﷺ), you are only a one who reminds”.

[Al-Ghāshiyah 88:17–21]

أَفَلَمۡ يَسِيرُواْ فِي ٱلۡأَرۡضِ فَيَنظُرُواْ

“Have they not travelled through the earth, and seen..”.

[Muḥammad 47:10]

Ayat of the Qur’an and Ahadith on the subject are many. See for example Hadith No. 66 mentioned before.