´Abu Sa'eed Al-Khudri narrated that the Messenger of Allah (S.A.W) said:` "When one of you visits the ill, then reassure him regarding his lifespan. Indeed that will not repel anything, but it will comfort his soul."
Related hadith on this topic
Explanation & Benefits
Shaykh Dr. Abdur Rahman Freywai
Explanation:
1:
That is, pray for his long life and recovery.
Note:
(In the chain of narration, Musa bin Muhammad bin Ibrahim Taymi is a narrator whose hadith are rejected [munkar al-hadith].)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 2087