Spreading themselves
'Spreading themselves on the earth,' as in Genesis 8:17, signifies the internal self operating on the external.
(References: Arcana Coelestia 913)
Isaiah 41:17-18
17
The poor and needy seek water, and there is none. Their tongue fails for thirst. I, Yahweh, will answer them. I, the God of Israel, will not forsake them.
18
I will open rivers on the bare heights, and springs in the midst of the valleys. I will make the wilderness a pool of water, and the dry land springs of water.