Silsilah as-Sahihah 1014 — Size of pebbles for stoning

Sayyiduna Fadl bin Abbas (may Allah be pleased with them both) narrates that when the people returned on the evening of Arafah and the morning of Muzdalifah, the Messenger of Allah (peace and blessings be upon him) said to them: "Adopt calmness." At that time, he himself was restraining his she-camel (from moving fast), until he entered Mina and descended in the valley of Muhassir. The Prophet (peace and blessings be upon him) said: "Collect pebbles (the size of chickpeas or beans) with which the Jamrah is to be pelted."