It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "This religion has a rise and a decline. Listen! Part of the rise of this religion is that an entire tribe gains understanding (of the religion), until only one or two sinners remain in it, and those two sinners are humiliated in it; if they speak, they are suppressed and oppressed. And part of the decline of this religion is that an entire tribe turns away (from the religion), until only one or two people of understanding remain in it, and those two are humiliated in it; if they speak, they are suppressed and oppressed. And the later ones of the Ummah will curse the earlier ones. Beware! The curse will have befallen them when they drink wine openly, until a woman passes by a group of people and one of them gets up to her and lifts her hem just as the tail of a ewe is lifted, and someone will only say: Get behind some wall! On that day he will be among them like Abu Bakr and Umar (may Allah be pleased with them both) are among you. So whoever enjoins good and forbids evil on that day will have the reward of fifty of those who saw me, believed in me, obeyed me and followed me."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7776