"The Messenger of Allah stayed overnight in dhul-Hulaifah, where he started his Hajj with this action, and he prayed in the Masjid there.''(sahih)
Sunan an-Nasa'i Book 24, Hadith 41
← Previous Hadith It was narrated from Ibn 'Abbas that the Prophet designated Dhul-Hulaifah as the Miqat for the people of Al-Madinah, Al-Juhfah for the people of Ash-shamham, Yalmlam for the people of Yemen, and Qarn for the people of Najd. They are for them and for those who pass by them who are not of their people, intending to perform Hajj or 'Umrah. If a person's place of residence is within the boundary of they Miqat, then (he should enter Ihram) from where he starts his journey, and this also applies to the people of Makkah.

Sunan an-Nasa'i Book 24, Hadith 40 Next Hadith → when the Messenger of Allah was in Dhul-Hulaifah someone came to him and he was told: "You are in a blessed valley.''(sahih)

Sunan an-Nasa'i Book 24, Hadith 42