Key Verses

1. 16:70An-Nahl
   وَٱللَّهُ خَلَقَكُمۡ ثُمَّ يَتَوَفَّىٰكُمۡۚ وَمِنكُم مَّن يُرَدُّ إِلَىٰٓ أَرۡذَلِ ٱلۡعُمُرِ لِكَيۡ لَا يَعۡلَمَ بَعۡدَ عِلۡمٖ شَيۡـًٔاۚ إِنَّ ٱللَّهَ عَلِيمٞ قَدِيرٞ
   And Allah createth you, then causeth you to die, and among you is he who is brought back to the most abject stage of life, so that he knoweth nothing after (having had) knowledge. Lo! Allah is Knower, Powerful.
   In context

   Allah created you without a precedent; then He will cause you to die when your term of life ends. The lifespan of some of you will be extended to the worst stage of life, which is the severe old-age, when a person will no longer know anything of what he used to know. Allah is knowing, and no action of His servants is hidden from Him. He is powerful and nothing can overpower Him.

2. 22:5Al-Hajj
   يَـٰٓأَيُّهَا ٱلنَّاسُ إِن كُنتُمۡ فِي رَيۡبٖ مِّنَ ٱلۡبَعۡثِ فَإِنَّا خَلَقۡنَٰكُم مِّن تُرَابٖ ثُمَّ مِن نُّطۡفَةٖ ثُمَّ مِنۡ عَلَقَةٖ ثُمَّ مِن مُّضۡغَةٖ مُّخَلَّقَةٖ وَغَيۡرِ مُخَلَّقَةٖ لِّنُبَيِّنَ لَكُمۡۚ وَنُقِرُّ فِي ٱلۡأَرۡحَامِ مَا نَشَآءُ إِلَىٰٓ أَجَلٖ مُّسَمّٗى ثُمَّ نُخۡرِجُكُمۡ طِفۡلٗا ثُمَّ لِتَبۡلُغُوٓاْ أَشُدَّكُمۡۖ وَمِنكُم مَّن يُتَوَفَّىٰ وَمِنكُم مَّن يُرَدُّ إِلَىٰٓ أَرۡذَلِ ٱلۡعُمُرِ لِكَيۡلَا يَعۡلَمَ مِنۢ بَعۡدِ عِلۡمٖ شَيۡـٔٗاۚ وَتَرَى ٱلۡأَرۡضَ هَامِدَةٗ فَإِذَآ أَنزَلۡنَا عَلَيۡهَا ٱلۡمَآءَ ٱهۡتَزَّتۡ وَرَبَتۡ وَأَنۢبَتَتۡ مِن كُلِّ زَوۡجِۭ بَهِيجٖ
   O mankind! if ye are in doubt concerning the Resurrection, then lo! We have created you from dust, then from a drop of seed, then from a clot, then from a little lump of flesh shapely and shapeless, that We may make (it) clear for you. And We cause what We will to remain in the wombs for an appointed time, and afterward We bring you forth as infants, then (give you growth) that ye attain your full strength. And among you there is he who dieth (young), and among you there is he who is brought back to the most abject time of life, so that, after knowledge, he knoweth naught. And thou (Muhammad) seest the earth barren, but when We send down water thereon, it doth thrill and swell and put forth every lovely kind (of growth).
   In context

   O people, if you have any doubt regarding My power to resurrect you after your death, think about your creation: I created your father Adam from soil; then I created his children from sperm which the man casts into the woman’s womb; then the sperm turns into solid blood; then the solid blood turns into a piece of meat; then the piece of meat turns into either a sound creation which remains in the…