Cross reference
Leviticus 11:36
36 But at the same time a fountain or a place where water is stored for use will be clean; but anyone touching their dead bodies will be unclean.
Zechariah 13:1
1 In that day there will be a fountain open to the family of David and to the people of Jerusalem, for sin and for that which is unclean.
John 4:14
14 But whoever takes the water I give him will never be in need of drink again; for the water I give him will become in him a fountain of eternal life.