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 for allah is allknowing allpowerful.
والله خلقكم ثم يتوفاكم ومنكم من يرد إلى أرذل العمر لكي لا يعلم بعد علم شيئا إن الله عليم قدير