An-Nahl - 16:70

وَاللّهُ خَلَقَكُمْ ثُمَّ يَتَوَفَّاكُمْ وَمِنكُم مَّن يُرَدُّ إِلَى أَرْذَلِ الْعُمُرِ لِكَيْ لاَ يَعْلَمَ بَعْدَ عِلْمٍ شَيْئًا إِنَّ اللّهَ عَلِيمٌ قَدِيرٌ
[16:70]
And Allah has created you, then He causes you to die, and of you is he who is brought back to the worst part of life, so that after having knowledge he does not know anything; surely Allah is Knowing, Powerful.
It is Allah who creates you and takes your souls at death; and of you there are some who are sent back to a feeble age, so that they know nothing after having known (much): for Allah is All-Knowing, All-Powerful.
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.