Bismillahir Rahmanir Rahim
Assalamu alaikum warahmatullahi wabarakatuhu
Ibn `Abbas (May Allah be pleased with them) reported: The Prophet (PBUH) said,
"He who visits a sick person who is not on the point of death and supplicates seven times:
As'alullahal-`Azima Rabbal-`Arshil-`Azimi, an yashfiyaka
(I beseech Allah the Great, the Rubb of the Great Throne, to heal you),
Allah will certainly heal him from that sickness.''
[Abu Dawud and At-Tirmidhi].