al-Qasim bin Zakaria bin Yahya القاسم بن زكريا بن يحيى البغدادي · The Book of Hajj

"The Messenger of Allah departed (From Arafat) in a tranquil manner, and he enjoined them to be tranquil. He hurried in the valley of Muhassir and told them to stone the Jamrat with (pebbles like date stones or fingertips. (Daif)