Hadith 8:1266
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from Abu al-Zubayr, from Jabir, who attributed it to the Prophet (marfu’): He said: "Throw them with the likes of the pebbles of al-khadhf (small pebbles thrown between the thumb and index finger)."
حدثنا أبو بكر قال حدثنا وكيع عن سفيان عن أبي الزبير عن جابر رفعه قال ارموها بمثل حصى الخذف