Cikin suratul Yasin aya ta (68) Allah (Subhanahu Wata’ala) ya ce:
“Duk wanda muka tsawaita rayuwarsa za mu tauye shi a halitta shin ba sa hankalta ne”.
Don haka, duk wanda shekarunsa suka zarce shekarun ganiyar ƙarfi (wato shekara arba’in (40) ), to fa baya zai rinƙa yi ba gaba ba.
An karɓo hadisi daga Usamatu ɗan Sharik Allah ya yarda da shi ya ce: ƙauyawa sun ce: Ya Manzon Allah! (Sallallahu alaihi wa sallam), ko ma yi magani? Manzon Allah (Sallallahu Alaihi Wa sallam) ya ce; E, ku bayin Allah ku yi magani, haƙiƙa Allah bai sanya wata cuta ba, face sai da ya sama mata waraka (da magani), sai dai ciwo ɗaya, suka ce wane ciwo ne? ya ce tsufa.” Ahmad, Abu Dawud da wasunsu ne suka rawaito shi.
