Narrated 'Abdur-Rahman bin Ya'mar:
that the Messenger of Allah (ﷺ) said: The Hajj is 'Arafat, the Hajj is 'Arafat, the Hajj is 'Arafat. The days of Mina are three: But whoever hastens to leave in two days, there is no sin on him, and whoever stays on, there is no sin on him (2:203). And whoever sees (attends) the 'Arafah before the rising of Fajr, then he has performed the Hajj. Ibn Abi 'Umar said: Sufyan bin 'Uyainah said: 'This is the best Hadith that Ath-Thawri reported.'