It is narrated from Sayyiduna Asim bin Adi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) permitted the camel herders to come in turns and stone on the Day of Sacrifice, then leave off (the stoning of the remaining days).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14528