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And the waters prevailed upon the earth a hundred and fifty days.
In Genesis 7:11, this signifies labor and combat. (Arcana Coelestia 755) This also signifies the whole state before regeneration. 'Three' and 'seven' are holy, while 'two' or 'six', which come before them, are not holy but in comparison are unholy. (Arcana Coelestia 900)