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.
(Referenser: Arcana Coelestia 8286)
2 Peter 3:5
5
For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: