It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "All of Muzdalifah is a place of standing, but move up away from the valley of Muhassir; and all of Mina is a place of sacrifice."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10955