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.
(References: Arcana Coelestia 8286)
Numbers 25:1-4
1
Israel stayed in Shittim; and the people began to play the prostitute with the daughters of Moab:
2
for they called the people to the sacrifices of their gods; and the people ate, and bowed down to their gods.
3
Israel joined himself to Baal Peor: and the anger of Yahweh was kindled against Israel.
4
Yahweh said to Moses, "Take all the chiefs of the people, and hang them up to Yahweh before the sun, that the fierce anger of Yahweh may turn away from Israel."