congealed in the heart of the sea

The LORD is a warrior; the LORD is his name. Pharaoh's chariots and his army he cast into the sea; his picked officers were sunk in the Red Sea. The floods covered them; they went down into the depths like a stone. Your right hand, O LORD, glorious in power-- your right hand, O LORD, shattered the enemy. In the greatness of your majesty you overthrew your adversaries; you sent out your fury, it consumed them like stubble. At the blast of your nostrils the waters piled up, the floods stood up in a heap; the deeps congealed in the heart of the sea. The enemy said, 'I will pursue, I will overtake, I will divide the spoil, my desire shall have its fill of them. I will draw my sword, my hand shall destroy them.' You blew with your wind, the sea covered them; they sank like lead in the mighty waters.
Exodus 15:3-10