It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "I stood here at Arafah, and all of Arafah is a place of standing; I stood here at Muzdalifah, and all of Muzdalifah is a place of standing; and I slaughtered (my sacrifice) here, and all of Mina is a place of slaughter; so slaughter at your lodgings."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10228