“He made also ten lavers: and he see five on the right hand, and five on the left, to wash in them all such things as they mere to offer for holocausts: but the sea was for the priests to wash in.” (2 Chronicles 4:6)
Literal Sense: Ten lavers, or basins, were made in order to wash the sacrificial victims but the largest basin, the sea, was reserved for the ritual washing of the priests.
Allegorical Sense: As the sacrificial victims were washed before they were sacrificed to God, so it is that the members of the church are washed in the waters of baptism before they are presented to God as living sacrifices (Romans 12:1).
Moral Sense: If God required animal sacrifices to be washed and burned as sacrifices, how much more ought we to be washed with the sacrament of penance and present ourselves to God as sacrifices consumed with the fire of the Holy Spirit.
Anagogical Sense: In heaven there will no longer remain any part of us that requires washing and it is in heaven that we will be perfectly dedicated as pleasing sacrifices to God, as our lives will be completely given over to Him.