Narrated Abu Shuraih Al-Ka`bi
Allah's Messenger (ﷺ) said, Whoever believes in Allah and the Last Day, should serve his guest generously. 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." Narrated Malik: Similarly as above (156) adding, "Who 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).
Narrated Abu Huraira
The Prophet (ﷺ) said, "Whoever believes in Allah and the Last Day, should not hurt his neighbor and whoever believes in Allah and the Last Day, should serve his guest generously and whoever believes in Allah and the Last Day, should speak what is good or keep silent."
Narrated `Uqba bin 'Amir
We said, "O Allah's Messenger (ﷺ)! You send us out and it happens that we have to stay with such people as do not entertain us. What do you think about it?" Allah's Messenger (ﷺ) said to us, "If you stay with some people and they entertain you as they should for a guest, accept is; but if they do not do then you should take from them the right of the guest, which they ought to give."
Narrated Abu Huraira
The Prophet (ﷺ) said, "Whoever believes in Allah and the Last Day, should serve his guest generously; and whoever believes in Allah and the Last Day, should unite the bond of kinship (i.e. keep good relation with his kith and kin); and whoever believes in Allah and the Last Day, should talk what is good or keep quiet."