"and his hands were steadfast": one hand, in that he had not taken aught from Israel; the other hand, Moses saying before the Holy One Blessed be He: L–rd of the universe, by my hand You took Israel out of Egypt, and by my hand You split the sea for them, and by my hand You wrought for them miracles and acts of might. So, by my hand, perform for them miracles and acts of might at this time.