Musannaf Ibn Abi Shaybah 14681 — Raising the hands when stoning

Mujahid and Sa'id bin Jubayr said: When Sayyiduna Ibn Abbas (may Allah be pleased with them both) performed the stoning, we saw him raise his hands until they were level with his head, and the whiteness of his armpits could be seen; and his pebbles were the size of a plump hazelnut.