After the Israelites had escaped from slavery and were safe from their pursuers, the Lord chose Aaron and his descendents to serve as priests. God said to Aaron, "I will dwell among the Israelites, and I will be their God. And they shall know that I am the Lord their God, who brought them out of the land of Egypt that I might dwell among them; I am the Lord their God." After Aaron had made offerings to God, he "lifted his hands toward the people and blessed them...and the glory of the Lord appeared to all the people."
Exodus 29 and Leviticus 9:22-24
Potential ornament for the Jesse Tree: a hand (for blessing)