Narrated `Aisha:

The Quraish people and those who embraced their religion, used to stay at Muzdalifa and used to call themselves Al-Hums, while the rest of the Arabs used to stay at `Arafat. When Islam came, Allah ordered His Prophet to go to `Arafat and stay at it, and then pass on from there, and that is what is meant by the Statement of Allah:--"Then depart from the place whence all the people depart......" (2.199)

Narrated Ibn `Abbas:

A man who wants to perform the Hajj (from Mecca) can perform the Tawaf around the Ka`ba as long as he is not in the state of Ihram till he assumes the Ihram for Hajj. Then, if he rides and proceeds to `Arafat, he should take a Hadi (i.e. animal for sacrifice), either a camel or a cow or a sheep, whatever he can afford; but if he cannot afford it, he should fast for three days during the Hajj before the day of `Arafat, but if the third day of his fasting happens to be the day of `Arafat (i.e. 9th of Dhul-Hijja) then it is no sin for him (to fast on it). Then he should proceed to `Arafat and stay there from the time of the `Asr prayer till darkness falls. Then the pilgrims should proceed from `Arafat, and when they have departed from it, they reach Jam' (i.e. Al-Muzdalifa) where they ask Allah to help them to be righteous and dutiful to Him, and there they remember Allah greatly or say Takbir (i.e. Allah is Greater) and Tahlil (i.e. None has the right to be worshipped but Allah) repeatedly before dawn breaks. Then, after offering the morning (Fajr) prayer you should pass on (to Mina) for the people used to do so and Allah said:-- "Then depart from the place whence all the people depart. And ask for Allah's Forgiveness. Truly! Allah is Oft-Forgiving, Most Merciful." (2.199) Then you should go on doing so till you throw pebbles over the Jamra.

Narrated `Urwa:

During the Pre-Islamic period of Ignorance, the people used to perform Tawaf of the Ka`ba naked except the Hums; and the Hums were Quraish and their offspring. The Hums used to give clothes to the men who would perform the Tawaf wearing them; and women (of the Hums) used to give clothes to the women who would perform the Tawaf wearing them. Those to whom the Hums did not give clothes would perform Tawaf round the Ka`ba naked. Most of the people used to go away (disperse) directly from `Arafat but they (Hums) used to depart after staying at Al-Muzdalifa. `Urwa added, "My father narrated that `Aisha had said, 'The following verses were revealed about the Hums: Then depart from the place whence all the people depart--(2.199) `Urwa added, "They (the Hums) used to stay at Al-Muzdalifa and used to depart from there (to Mina) and so they were sent to `Arafat (by Allah's order)."

'A'isha (Allah be pleased with her) reported that the Quraish (of the pre-Islamic days) and those who followed their religions practices stayed at Muzdalifa, and they named themselves as Hums, whereas all other Arabs stayed at 'Arafa. With the advent of Islam, Allah, the Exalted and Glorious, commanded His Apostle (ﷺ) to come to 'Arafat and stay there, and then hurry from there, and this is the significance of the words of Allah:" Then hasten on from where the people hasten on."