Spreading themselves
'Spreading themselves on the earth,' as in Genesis 8:17, signifies the internal self operating on the external.
(Verweise: Arcana Coelestia 913)
Arcana Coelestia #8807
8807. 'And they washed their garments' means purification of the truths of faith. This is clear from what has been stated above in 8789, where similar words occur.