Hazrat Ali (radhiyallahu ‘anhu) reports:
On one occasion, I had fallen ill. While I was ill, Rasulullah (sallallahu ‘alaihi wasallam) came to visit me. When Rasulullah (sallallahu ‘alaihi wasallam) entered my home, I was lying down. Seeing me in this state, Rasulullah (sallallahu ‘alaihi wasallam) came close to my side and then took off the shawl he was wearing and then covered me with it. Thereafter, on seeing my weakness, Rasulullah (sallallahu ‘alaihi wasallam) stood up, went to the musjid and performed some nafl salaah. After performing salaah, he beseeched Allah Ta‘ala to bless me with shifaa.
Therafter, Rasulullah (sallallahu ‘alaihi wasallam) came to me, lifted his shawl from me and addressed me saying, “Stand up, O the son of Abu Taalib, for you have been cured!” I thus stood up, and found myself to be completely cured. I found myself in such a state that there was no sign of the illness or weakness left in my body.
Rasulullah (sallallahu ‘alaihi wasallam) then said, “Whenever I made du‘aa to Allah Ta‘ala, He accepted my du‘aa and granted me what I had asked for. (On this occasion,) whatever I asked for myself, I also asked for you, (including your shifaa).” (Fazaa’il-ul-Khulafaa li-Abi Nu’aim #79)
From this incident, we see the great love that Rasulullah (sallallahu ‘alaihi wasallam) had for Hazrat Ali (radhiyallahu ‘anhu). Similarly, we understand that Rasulullah (sallallahu ‘alaihi wasallam) had taught us, through his mubaarak action, that when we fall ill, then we should turn to Allah Ta‘ala in du‘aa, begging Him for shifaa, as everything lies in the control and power of Allah Ta‘ala.