Exodus 15
Exodus 15 is Israel's first extended act of corporate worship, and it pours out of them like water long held back. The Song of the Sea — the oldest extended poem in Scripture — celebrates what God has done with the kind of specific, visceral detail that only witnesses can write: the horse and rider thrown into the sea, the depths congealing, the enemy's arrogance cut short. The song's central declaration — the Lord is my strength and my song, and He has become my salvation — is quoted in Isaiah 12:2 and echoed in Revelation 15:3 by those standing victorious before God. Miriam leads the women in dance and refrain. Then the scene shifts abruptly: three days into the wilderness, no water, bitter water at Marah, and the people grumble. God sweetens the water with a piece of wood — a detail the church has read as a shadow of the cross — and issues the first formal test: will Israel obey? Obedience is connected directly to health and wholeness. Then they come to Elim, with twelve springs and seventy palm trees — abundance after bitterness, rest after testing. The rhythm of trial and provision will define the wilderness years.