Yahya related to me from Malik from Abdullah ibn Abi Bakr ibnHazm from his father that Abu'l-Baddah ibn Asim ibn Adi told him fromhis father that the Messenger of Allah, may Allah bless him and granthim peace, allowed the camel-herders to spend the night outside ofMina, and they threw the stones (once) on the day of sacrifice, and(once) for the following day and the day after that, and (once) on theday when they left Mina.
USC-MSA web (English) reference: Book 20, Hadith 227
Arabic reference: Book 20, Hadith 924