Sahih al-Bukhari 6135
Narrated Abu Shuraih Al-Kaʿbi: 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)
Sahih al-Bukhari 6019
Narrated Abu Shuraih Al-Adawi: My ears heard and my eyes saw the Prophet (ﷺ) when he spoke, "Anybody who believes in Allah and the Last Day, should serve his neighbor generously, and anybody who believes in Allah and the Last Day should serve his guest generously by giving him his reward." It was asked. "What is his reward, O Allah's Messenger (ﷺ)?" He said, "(To be entertained generously) for a day and a night with high quality of food and the guest has the right to be entertained for three days (with ordinary food) and if he stays longer, what he will be provided with will be regarded as Sadaqa (a charitable gift). And anybody who believes in Allah and the Last Day should talk what is good or keep quiet (i.e. abstain from all kinds of dirty and evil talks)
Sahih al-Bukhari 6140
Narrated ʿAbdur-Rahman bin Abu Bakr: Abu Bakr invited a group of people and told me, "Look after your guests." Abu Bakr added, I am going to visit the Prophet (ﷺ) and you should finish serving them before I return." ʿAbdur-Rahman said, So I went at once and served them with what was available at that time in the house and requested them to eat." They said, "Where is the owner of the house (i.e., Abu Bakr)?" ʿAbdur-Rahman said, "Take your meal." They said, "We will not eat till the owner of the house comes." ʿAbdur-Rahman said, "Accept your meal from us, for if my father comes and finds you not having taken your meal yet, we will be blamed severely by him, but they refused to take their meals . So I was sure that my father would be angry with me. When he came, I went away (to hide myself) from him. He asked, "What have you done (about the guests)?" They informed him the whole story. Abu Bakr called, "O ʿAbdur Rahman!" I kept quiet. He then called again. "O ʿAbdur-Rahman!" I kept quiet and he called again, "O ignorant (boy)! I beseech you by Allah, if you hear my voice, then come out!" I came out and said, "Please ask your guests (and do not be angry with me)." They said, "He has told the truth; he brought the meal to us." He said, "As you have been waiting for me, by Allah, I will not eat of it tonight." They said, "By Allah, we will not eat of it till you eat of it." He said, I have never seen a night like this night in evil. What is wrong with you? Why don't you accept your meals of hospitality from us?" (He said to me), "Bring your meal." I brought it to him, and he put his hand in it, saying, "In the name of Allah. The first (state of fury) was because of Satan." So Abu Bakr ate and so did his guests