Waters
'Waters' particularly signify the spiritual parts of a person, or the intellectual aspects of faith, and also their opposites.
'The waters above the firmament,' as in Genesis 1:7, signify the knowledges in the internal self, and 'the waters beneath the firmament' signify the knowledges of the external self.
'Waters,' as in Ezekiel 47:9, refer to the New Jerusalem, and they signify spiritual things from a celestial origin.
'Many waters,' as in Revelation 17:1, signify truths of the Word adulterated. 'Waters' or 'rivers' signify spiritual, rational, or scientific things pertaining to truth.
'Waters … that go softly,' as in Isaiah 8:6-7, signify spiritual things, and 'waters … strong and many,' signify falsities.
'Waters,' as in Psalms 104:3, signify divine truths.
'Waters' signify truths in the natural self, and in the opposite sense, falsities.
'The waters were dried up from off the earth,' as in Genesis 8:7, signifies the apparent dissipation of falsities.
(References: Apocalypse Explained 17; Apocalypse Revealed 50; Genesis 8)
Leviticus 15:29-30
29
On the eighth day she shall take two turtledoves, or two young pigeons, and bring them to the priest, to the door of the Tent of Meeting.
30
The priest shall offer the one for a sin offering, and the other for a burnt offering; and the priest shall make atonement for her before Yahweh for the uncleanness of her discharge.