There are five qualities which a Muslim should display to his brother : return of salutation, response to the one who sneezes, acceptance of the invitation, paying sick visit to a patient, and accompanying the funeral.
“The Messenger of Allah (ﷺ) sent an expedition force ! Nothing prevented me from learning Surat Al-Baqarah except fearing that I would not be able to stand with (in voluntary night prayer).’ The Messenger of Allah (ﷺ) said: ‘Learn the Qur’an to recite it, for indeed the parable of the Qur’an for the one who recites it and stands with it (in prayer) is that of a bag full of musk whose scent fills the air all around. And the parable of the one who learns it then sleeps while it is in his memory is that of a bag containing musk that is tied shut.'”
“When the Messenger of Allah (ﷺ) died, they differed as to whether his grave should have a niche or a ditch in the ground, until they spoke and raised their voices concerning that. Then ‘Umar said: ‘Do not shout in the presence of the Messenger of Allah (ﷺ), living or dead,’ or words to that effect. So they sent for both the one who made a niche and the one who dug graves without a niche, and the one who used to make a niche came and dug a grave with a niche for the Messenger of Allah (ﷺ), then he (ﷺ) was buried.”