Sunan Ibn Majah Book 25, Hadith 134
“I heard ‘Abdur-Rahman bin Ya’mur
Dili say: ‘I saw the Messenger of Allah (ﷺ) when he was standing
at
‘Arafat, and some people from Najd came to him and said: “O
Messenger
of Allah, what is Hajj?” He said: “Hajj is ‘Arafah.
Whoever comes
before Fajr prayer on the night of Jam’, he has
completed his Hajj.
The days at Mina are three. ‘But whosoever
hastens to leave in two
days, there is no sin on him and whosoever
stays on, there is no sin
on him.’” Then he seated a man
behind him on his mount and he
started calling out these words.’”
Another chain reports a similar hadith.
“There is no day on which Allah ransoms more slaves from the Fire than the Day of ‘Arafah. He draws closer and closer, then He boasts about them before the angels and says: ‘What do these people want?’”
“I came to the Prophet (ﷺ) and said: ‘O Messenger of Allah, I have made my camel lean (because of the long journey) and I have worn myself out. By Allah, there is no sand hill on which I did not stand. Have I performed Hajj?’ The Prophet (ﷺ) said: ‘Whoever attended the prayer (i.e., Fajr at Muzdalifah) with us and departed from ‘Arafat, by night or day, may remove the dirt and has completed his Hajj.’”