Translation of the verse 68 from Surah Ya-Sin : Number of verses 83 - - page 444 - Part 23.
And he whom We grant long life, We reverse him in creation (weakness after strength). Will they not then understand?
And he to whom We grant long life We reverse in creation; so will they not understand?
(36:68) Whomsoever We grant a long life, We reverse him in his constitution. *57 Do they still not understand?
*57) "Reverse him in nature," means that in old age Allah turns him back to the state of childhood. He becomes unable to stand and walk without the help and support of others; he is fed by others; he urinates and defecates in bed; talks childishly and is laughed at by others. In short, towards the end of life he returns to the same state of weakness with which he had started lift in this world."