Abu Huraira (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "All the sins of my Ummah are forgivable except those who commit sins openly. And committing sins openly is that a person does an act (of sin) at night, then in the morning he goes around saying: O so-and-so! I did such and such last night, even though Allah had concealed it for him, and he spent the night while his Lord had covered him, but when morning comes, he removes Allah's covering from himself." Agreed upon. And the hadith narrated from Abu Huraira (may Allah be pleased with him): "Whoever believes in Allah..." is mentioned in the chapter of Hospitality.