After Islam spreads far and wide, encompassing the east and the west, it will become weak once again and evil will become strong. This great religion will be taken away, the Quran will be removed and knowledge will vanish. Allaah will take [in death] everyone in whose heart is any trace of faith, and after that none will be left but the most evil of creation, upon whom the Hour will come.
Ibn Majah and AI-Haakim narrated that Hudayfah ibn al-Yaman (RA) stated: The Messenger of Allaah [peace and blessings be upon him] said: "Islam will wear out like the adornment of a garment wears out until no one will know what fasting, sacrifice or charity are The Book of Allaah will be taken away in one night, and not one aayah will be left on earth. There will remain groups of people, old men and old women, who will say, We heard our forefathers saying this word, Laa illaaha illallah, so we say it. In This small remnant, who will know nothing of Islam except the word of Tawheed, will pass away.
In Muslim it is narrated that Abdullah ibn Masood (RA) said: The Messenger of Allaah [peace and blessings be upon him] said: "The Hour will only come upon the most evil of creation." In another hadith, the Prophet [peace and blessings be upon him] explained to us how the remnant of the righteous will pass away at the end of time. According to the hadith narrated by Muslim by Abu Hurayrah [RA], the Prophet [peace and blessings be upon him] said: "Allaah will send a wind from Yemen, softer than silk, and it will not leave anyone in whose heart an atoms weight of faith but it will seize him." It is narrated from Anas that the Messenger of Allaah [peace and blessings be upon him] said: "The hour will not begin until it is no longer said on earth, Allaah, Allaah."[Mishkaat al-Masaabeeh]. In Muslim it is narrated from an-Nawaas ibn Samaan and attributed to the Prophet [peace and blessings be upon him}: "Whilst they are like that Allaah will send a good wind which seize them below their armpits, and will take the soul of every believer and every Muslim."
There will be left the most evil of people who will fornicate like donkeys, and upon them the Hour will come. Another of the ways in which Islam will disappear those days will be that Hajj will no longer be performed; there will be no Hajj and no Umrah. In Musnad Abi Yaala and Mustadrak al-Haakim, it is narrated with a saheeh isnad that Abu Saeed [RA] stated: The Messenger of Allaah said: "The Hour will not come until there is no Hajj to the house. Undoubtedly this will happen after Allaah sends that good wind which will take [the souls of] the righteous. But until then, worship at the house [Kabah] will continue." In Bukhari it is narrated that Abu Saeed al-Khudri [RA} stated: The Messenger of Allaah said: "People will come on Hajj and Umrah to this House [even] after Ya`jooj and Ma`jooj emerge."