Water of separation [S]
used along with the ashes of a red heifer for the ceremonial cleansing of persons defiled by contact with a dead body ( Numbers 19 ).
These dictionary topics are from
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.
[S] indicates this entry was also found in Smith's Bible Dictionary
Bibliography InformationEaston, Matthew George. "Entry for Water of separation". "Easton's Bible Dictionary". .