In Genesis 38:14, this signifies truth obscured that pretends to be from good. (Arcana Coelestia 4859) The "high mountains being covered" (Genesis 7:19) signifies that all the good things of charity were extinguished.

(Reference: Arcana Coelestia 795)

578. These numbers alone show what the Word of the Lord includes within its bosom and inner recesses, namely arcana hidden away which are nowhere exposed to the naked eye. The same applies everywhere else, in that every expression contains things such as these.