15:1–21 Moses and Israel sing of deliverance and hope. The poem of vv. 1–18, unique in the Old Testament, is a victory song expressed in the first person singular as a song of Moses. It celebrates the Lord’s majestic power in saving Israel at the sea (vv. 1–12) and claims His power in planting Israel in the land (vv. 13–18). The song’s many archaic expressions point to its origin in the Mosaic period.