The Targum Pseudo-Jonathan on Exodus 14:14 finishes the fourfold answer from the verse before. Two parties still need their reply: the fighters and the screamers.
To the company who said, Let us set against them the line of battle, Moses says: "Contend not; for the victory shall be wrought among you from the presence of the Lord." You are not the army. The army is God. Stand down.
To the company who said, Let us raise a cry against them, Moses says: "Be silent; and give the glory, and praise, and exaltation to your God." Your voice is not a weapon here. Turn it into a song.
Both answers work the same way. They take an impulse toward action and redirect it toward worship. The fighters wanted to fight—Moses tells them to let God fight. The screamers wanted to scream—Moses tells them to praise.
The Targum is making a startling claim about redemption. At the Sea of Reeds, human effort is beside the point. "The Lord shall fight for you, and ye shall hold your peace," the Hebrew verse says. The Targum expands it into an instruction: the right response to overwhelming miracle is silence, and then praise. Any action the people take on their own will only get in God's way.
Takeaway: the Targum teaches that there are moments when the most spiritual act is to stop acting and let God be God.