It is narrated from Sayyiduna Mu'adh and Abu Ubaydah (may Allah be pleased with them both); both of them said: The Messenger of Allah (peace and blessings be upon him) said: "This matter began as mercy and Prophethood, then it will be mercy and caliphate, then it will become a biting kingship, then it will become arrogance, tyranny and corruption in the land. They will deem silk, unlawful private parts and wine to be lawful; they will be given provision in that state and they will be helped, until they meet Allah, the Mighty and Majestic."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 364