Greetings
Narrated Abdullah bin ‘Amr: A man asked the Prophet (S.A.W), “What Islamic traits are the best?” The prophet (S.A.W) said, “Feed the people, and greet those whom you know and those whom you do not know”. Bukhari Collection

General utterances
Narrated Malik (r.a): Allah’s Apostle (S.A.W) said, “… Whoever believes in Allah and the Last Day should talk what is good or keep quiet.”(i.e. abstain from dirty and evil talk, and should think before uttering). Bukhari Collection

Honouring the guest
Narrated Abu Shuraih (r.a): Allah’s Apostle said, “…The guest’s reward is: To provide him with a superior type of food for a night and a day and a guest is to be entertained with food for three days, and whatever is offered beyond that, is regarded as something given in charity. And it is not lawful for a guest to stay with his host for such a long period so as to put him in a critical position.” Bukhari Collection

Charity
Narrated Abu Musa Al-Ash’ari: The Prophet (S.A.W) said. “On every Muslim there is enjoined (a compulsory) Sadaqa (alms).” They (the people) said, “If one has nothing?” He said, “He should work with his hands so that he may benefit himself and give in charity…” Bukhari Collection

Sympathy
Narrated Abu Hurairah (r.a): The Messenger of Allah (S.A.W) said, “Allah (S.W.T) will say on the Day of Rising, ‘Son of Adam, I was ill and you did not visit me.’ The man will say, ‘O Lord! How could I visit You when You are the Lord of the Worlds?’ He will say, ‘Do you no know that My slave so-and-so was ill and you did not visit him? Do you not know that if you had visited him, you would have found Me with him?’ …” Muslim Collection