It is narrated from Sayyiduna Jubair bin Mut’im (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: The entire plain of Arafat is a place for standing (Wuquf), except avoid standing in the valley of ‘Urnah. Similarly, the whole of Muzdalifah is a place for standing, except avoid standing in the valley of Muhassir. And every opening in Mina is a place of sacrifice, and all the days of Tashreeq are days of sacrifice.
Hadith Referenceمسند احمد / مسند المدنيين رضي الله عنهم اجمعين / 16751
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف، سليمان بن موسى لم يدرك جبير بن مطعم، وقد اضطرب فيه ألوانا