(V.6:158):
A) Narrated Abu Hurairah رضي الله عنه: Allâh’s Messenger صلى الله عليه وسلم said, "The Hour will not be established until the sun rises from the west; and when the people see it, then whoever will be living on the surface of the earth, will have faith, and that is (the time) when no good will it do to a person to believe then, if he believed not before." (6:158) (Sahih Al-Bukhârî, Vol.6, Hadîth No.159).
B) Narrated Abu Hurairah رضي الله عنه: Allâh’s Messenger صلى الله عليه وسلم said; "When the following three signs appear, no good will it do to a person to believe then if he believed not before:
1) Rising of the sun from the west.
2) (The coming of Al-Masîh) Ad-Dajjal.
3) (The coming out of the) Dâbbat-ul-Ard (i.e. a beast from the earth)." (Sahih Muslim - The Book of Fitan - The Signs of the coming of the Hour).
C). Narrated Anas رضي الله عنه: The Prophet صلى الله عليه وسلم said, "No Prophet was sent but that he warned his followers against the one-eyed liar (Al-Masîh-Ad-Dajjâl). Beware! He is blind in one eye, and your Lord is not so, and there will be written between his (Al-Masîh Ad-Dajiâl’s) eyes (the word) Kâfir (i.e., disbeliever)." [This Hadîth is also quoted by Abu Hurairah and Ibn ‘Abbâs. (Sahih Al-Bukhârî, Vol.9, Hadîth No.245)].
(V.6:159) It is said that the Prophet صلى الله عليه وسلم recited this Verse and said: "These people are those who invent new things (Bid‘ah) in religion and the followers of the vain desires of this Muslim nation, and their repentance will not be accepted by Allâh." (TafsirAl-Qurtubi).
[It has been narrated in the Hadîth Books (At-Tirmidhi, Ibn Mâjah and Abu Dâwûd) that the Prophet صلى الله عليه وسلم said: "The Jews and the Christians will be divided into seventy-one or seventy-two religious sects and this nation will be divided into seventy-three religious sects, - all in Hell, except one, and that one is: on which I and my Companions are today, i.e. following the Qur’ân and the Prophet’s Sunnah (legal ways, orders, acts of worship, statements)"].
(V.6:160) See the footnote of (V.6:61).