Sahih al-Bukhari Book 86, Hadith 37
I will narrate to you a narration which nobody will narrate to you
after me. I heard that from the Prophet. I heard the Prophet (ﷺ) saying,
"The Hour will not be established" or said: "From among the portents
of the Hour is that the religious knowledge will betaken away (by the
death of religious Scholars) and general ignorance (of religion) will
appear; and the drinking of alcoholic drinks will be very common, and
(open) illegal sexual intercourse will prevail, and men will decrease
in number while women will increase so much so that, for fifty women
there will only be one man to look after them."
The Prophet (ﷺ) said, "Whoever guarantees me (the chastity of) what is between his legs (i.e. his private parts), and what is between his jaws (i.e., his tongue), I guarantee him Paradise."
Allah's Messenger (ﷺ)s said, "When a slave (of Allah) commits illegal sexual intercourse, he is not a believer at the time of committing it; and if he steals, he is not a believer at the time of stealing; and if he drinks an alcoholic drink, when he is not a believer at the time of drinking it; and he is not a believer when he commits a murder," 'Ikrima said: I asked Ibn Abbas, "How is faith taken away from him?" He said, Like this," by clasping his hands and then separating them, and added, "But if he repents, faith returns to him like this, by clasping his hands again.