it is allah who created you in a state of weakness then gave strength after weakness then after strength gave (you weakness and a hoary head he creates as he wills and it is he who has all knowledge and power.
الله الذي خلقكم من ضعف ثم جعل من بعد ضعف قوة ثم جعل من بعد قوة ضعفا وشيبة يخلق ما يشاء وهو العليم القدير