He shall purify himself with it With the water of separation. On the third day To typify Christ's resurrection on that day, by which we are cleansed or sanctified.
Related Commentaries of Numbers 19:12
Numbers 19:12
12 He shall purify himself with it on the third day, and on the seventh day he shall be clean: but if he purify not himself the third day, then the seventh day he shall not be clean.