It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that he said: "I saw the Prophet (peace and blessings be upon him) stoning with pebbles like hasa al-khadhf (small pebbles flicked with the fingers)."
No one narrated these hadiths from al-Mut'im (may Allah have mercy on him) except al-Haytham bin Humayd (may Allah have mercy on him), and Ali bin Hujr (may Allah have mercy on him) is alone in narrating them.