Gathered together, waters
In Exodus 15:8, this signifies falsities gathered together. Waters normally signify truths, but in this case, where they were blocking the escape of the Children of Israel from slavery and signify the opposite: falsities.
(Referenties: Arcana Coelestia 8286)
2 Samuel 22:16
16
Then the channels of the sea appeared. The foundations of the world were laid bare by the rebuke of Yahweh, At the blast of the breath of his nostrils.