Asim bin Adi (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) granted the herders a concession "that they take turns and stone on the Day of Sacrifice, then leave off for a day and a night, and then stone on the following day."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9674