Bismillah.
Narrated Zaid bin Jubair:
I went to visit 'Abdullah bin 'Umar (radiallaahu `anhu) at his house which contained many tents made of cotton cloth and these were encircled with Suradik (part of the tent). I asked him from where, should one assume Ihram for Umra. He said, "Allah's Apostle (sallallaahu `alayhi wasallam) had fixed as Miqat (singular of Mawaqit) Qarn for the people of Najd, Dhul-Hulaifa for the people of Medina, and Al-Juhfa for the people of Sham."
Narrated Ibn Abbas (radiallaahu `anhu):
The people of Yemen used to come for Hajj and used not to bring enough provisions with them and used to say that they depend on Allah. On their arrival in Medina they used to beg the people, and so Allah revealed, "And take a provision (with you) for the journey, but the best provision is the fear of Allah." (2.197).
Narrated Ibn Abbas (radiallaahu `anhu):
Allah's Apostle (sallallaahu `alayhi wasallam) made Dhul-Huiaifa as the Miqat for the people of Medina; Al-Juhfa for the people of Sham; Qarn-al-Manazil for the people of Najd; and Yalamlam for the people of Yemen; and these Mawaqit are for the people at those very places, and besides them for those who come thorough those places with the intention of performing Hajj and 'Umra; and whoever is living within these boundaries can assume lhram from the place he starts, and the people of Mecca can assume Ihram from Mecca.
Narrated Nafi':
'Abdullah bin 'Umar (radiallaahu `anhu) said, "Allah's Apostle (sallallaahu `alayhi wasallam) said, 'The people of Medina should assume lhram from Dhul-Hulaifa; the people of Sham from Al-Juhfa; and the people of Najd from Qarn." And 'Abdullah added, "I was informed that Allah's Apostle (sallallaahu `alayhi wasallam) had said, 'The people of Yemen should assume Ihram from Yalamlam.' "
Narrated Ibn Abbas (radiallaahu `anhu):
Allah's Apostle (sallallaahu `alayhi wasallam) had fixed Dhul Hulaifa as the Mlqat for the people of Medina; Al-Juhfa for the people of Sham; and Qarn Ul-Manazil for the people of Najd; and Yalamlam for the people of Yemen. So, these (above mentioned) are the Mawaqit for all those living at those places, and besides them for those who come through those places with the intention of performing Hajj and 'Umra and whoever lives within these places should assume Ihram from his dwelling place, and similarly the people of Mecca can assume lhram from Mecca.
Narrated Salim from his father who said:
"The Prophet (sallallaahu `alayhi wasallam) had fixed the Mawaqit as follows: (No. 603)
Narrated Salim bin 'Abdullah from his father:
I heard Allah's Apostle (sallallaahu `alayhi wasallam) saying, "The Miqat for the people of Medina is Dhul-Hulaifa; for the people of Sham is Mahita; (i.e. Al-Juhfa); and for the people of Najd is Qarn. And said Ibn 'Umar, "They claim, but I did not hear personally, that the Prophet (sallallaahu `alayhi wasallam) said, "The Miqat for the people of Yemen is Yalamlam."
Narrated Ibn Abbas (radiallaahu `anhu):
The Prophet (sallallaahu `alayhi wasallam) fixed Dhul-Hulaifa as the Miqat for the people of Medina, Al-Juhfa, for the people of Sham, Yalamlam for the people of Yemen, and Qarn for the people of Najd. And these Mawaqlt are for those living at those very places, and besides them for those who come through those places with the intention of performing Hajj and Umra; and whoever is living inside these places can assume lhram from his own dwelling place, and the people of Mecca can assume lhram from Mecca.
Narrated Ibn Abbas (radiallaahu `anhu):
The Prophet (sallallaahu `alayhi wasallam) fixed Dhul-Hulaifa as the Miqat for the people of Medina, Al-Juhfa for the people of Sham, Qarn-ul-Manazil for the people of Najd, and Yalamlam for the people of Yemen; and these Mawaqit are for those living at those very places, and besides them for those whom come through them with the intention of performing Hajj and Umra; and whoever is living within these Mawaqit should assume lhram from where he starts, and the people of Mecca can assume Ihram from Mecca.
Narrated Ibn Umar (radiallaahu `anhu):
When these two towns (Basra and Kufa) were captured, the people went to 'Umar (radiallaahu `anhu) and said, "O the Chief of the faithful believers! The Prophet (sallallaahu `alayhi wasallam) fixed Qarn as the Miqat for the people of Najd, it is beyond our way and it is difficult for us to pass through it." He said, "Take as your Miqat a place situated opposite to Qarn on your usual way. So, he fixed Dhatu-Irq (as their Miqat)."
Narrated Nafi:
'Abdullah bin 'Umar (radiallaahu `anhu) said, "Allah's Apostle (sallallaahu `alayhi wasallam) made his camel sit (i.e. he dismounted) at Al-Batha' in Dhul-Hulaifa and offered the prayer." 'Abdullah bin 'Umar (radiallaahu `anhu) used to do the same.
Narrated Ibn 'Umar (radiallaahu `anhu):
Allah's Apostle (sallallaahu `alayhi wasallam) used to go (for Hajj) via Ash-Shajara way and return via Muarras way; and no doubt, whenever Allah's Apostle (sallallaahu `alayhi wasallam) went to Mecca, he used to offer the prayer in the Mosque of Ash-Shajara; and on his return, he used to offer the prayer at Dhul-Hulaifa in the middle of the valley, and pass the night there till morning.
Narrated 'Umar (radiallaahu `anhu):
In the valley of Al-'Aqiq I heard Allah's Apostle (sallallaahu `alayhi wasallam) saying, "Tonight a messenger came to me from my Lord and asked me to pray in this blessed valley and to assume Ihram for Hajj and 'Umra together. "
Narrated Musa bin 'Uqba:
Salim bin 'Abdullah's father said, "The Prophet (sallallaahu `alayhi wasallam) said that while resting in the bottom of the valley at Mu'arras in Dhul-Hulaifa, he had been addressed in a dream: 'You are verily in a blessed valley.' " Salim made us to dismount from our camels at the place where 'Abdullah (radiallaahu `anhu) used to dismount, aiming at the place where Allah's Apostle had rested and it was below the Mosque situated in the middle of the valley in between them (the residence) and the road.
Must do after reaching miqaat: put on Ihram (if you haven't already) and recite talbiyah.
One may put on Ihram before reaching miqaat, or on reaching miqaat. But if he crosses miqaat without putting on Ihram, he has to go back and renew intention.
Taken from: http://ilookilisten.wordpress.com/2013/01/11/hajj-miqaat-ahadith-1297-1310/
