Every thing that may abide the fire, ye shall make it go
 through the fire
 Either through the smoke of the fire, and so be purified by suffumigation; or be put into the fire itself, where though they might be melted as the above things, yet not consumed as raiment, and vessels of skins, goats' hair, and wood, would be: 
 and it shall be clean;
 accounted so: 
 nevertheless, it shall be purified with the water of separation;
 with the water mixed with the ashes of the red heifer burnt, and sprinkled on it; see ( Numbers 19:9 ) 
 and all that abideth not the fire;
 without being consumed, as whatsoever is of wood 
 ye shall make go through the water;
 dip them in it, and rinse them there with a quantity sufficient; which the Targum of Jonathan says is forty seahs of water.