Please create a biblical scene in a watercolor art style. The scene represents a significant moment from the Old Testament when Moses, an elderly man with a long beard and clothing of the period, holds a handful of ashes. Beside him, his brother Aaron assists. Moses is in the motion of sprinkling the ashes towards the sky. A figure representing Pharaoh, in traditional Egyptian clothing, watches this from a distance. The atmosphere is reverent, and everything should be respectful and devotional to the Christian faith.