مسند أحمد

It was narrated from ‘Amr bin Huraith that he visited Hasan [when he was sick and ‘Ali was with him. `Ali (رضي الله عنه) said: Are you visiting Hasan [during his sickness] when you feel what you feel? He said to him. Yes; you are not the Lord of my heart, to direct it as you wili. `Ali (رضي الله عنه) said: That does not prevent me from giving you advice, I heard the Messenger of Allah (ﷺ) say: “There is no Muslim who visits a Muslim, but Allah will send to him seventy thousand angels who will send blessings upon him from whatever hour of the day it is until evening comes, and from whatever hour of the night it is until morning comes.`