A Muslim has five duties towards another Muslim to return a salutation, visit the sick, follow funerals, accept an invitation and say 'God have mercy on you' when one sneezes.
Quotes about salutation (7 Quotes)
What is the appropriate behavior for a man or a woman in the midst of this world, where each person is clinging to his piece of debris? What's the proper salutation between people as they pass each other in this flood?
There is no blame on the blind man, nor is there blame on the lame, nor is there blame on the sick, nor on yourselves that you eat from your houses, or your fathers' houses or your mothers' houses, or your brothers' houses, or your sisters' houses, or your paternal uncles' houses, or your paternal aunts' houses, or your maternal uncles' houses, or your maternal aunts' houses, or what you possess the keys of, or your friends' (houses). It is no sin in you that you eat together or separately. So when you enter houses, greet your people with a salutation from Allah, blessed (and) goodly thus does Allah make clear to you the communications that you may understand.
Those who are nearest to God are they who are first to give a salutation.
A short letter to a distant friend is, in my opinion, an insult like that of a slight bow or cursory salutation -- a proof of unwillingness to do much, even where there is a necessity of doing something.
Knowledge is not eating, and we cannot expect to devour and possess what we mean. Knowledge is recognition of something absent; it is a salutation, not an embrace.
Death is only a launching into the region of the strange Untried it is but the first salutation to the possibilities of the immense Remote, the Wild, the Watery, the Unshored...