Numbers 19:12

And he shall purify himself with the ashes the third day and then he shall be clean the seventh day. And if he purify not himself the third day, then the seventh day, he shall not be clean.

Numbers 31:19

And lodge without the host seven days, all that have killed any person and all that have touched any dead body, and purify both yourselves and your prisoners; the third day and the seventh.

Exodus 19:11

that they may be ready against the third day. For the third day the LORD will come down in the sight of all the people upon mount Sinai.

Exodus 19:15

And he said unto the people, "Be ready against the third day, and see that ye come not at your wives."

Leviticus 7:17

but as much of the offered flesh as remaineth unto the third day shall be burned with fire.

Numbers 19:17-19

And they shall take for an unclean person, of the burnt ashes of the sin offering, and put running water thereto into a vessel.

Psalm 51:7

Thou shalt purge me with hyssop, and I shall be clean; thou shalt wash me, and I shall be whiter than snow.

Ezekiel 36:25

And I will pour pure water upon you, and ye shall be cleansed from all uncleanness, and from all your idols. I will cleanse you.

Hosea 6:2

He hath wounded us, and he shall bind us up again; after two days shall he quicken us, in the third day he shall raise us up, so that we shall live in his sight.

Acts 15:9

And he put no difference between them and us, but with faith purified their hearts.

1 Corinthians 15:3-4

For first of all, I delivered unto you that which I received: how that Christ died for our sins, agreeing to the scriptures,

Revelation 7:14

And I said unto him, "Lord, thou knowest." And he said unto me, "These are they which came out of great tribulation and made their garments large, and made them white in the blood of the lamb:

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

He shall purify

Numbers 19:17
And they shall take for an unclean person, of the burnt ashes of the sin offering, and put running water thereto into a vessel.
Psalm 51:7
Thou shalt purge me with hyssop, and I shall be clean; thou shalt wash me, and I shall be whiter than snow.
Ezekiel 36:25
And I will pour pure water upon you, and ye shall be cleansed from all uncleanness, and from all your idols. I will cleanse you.
Acts 15:9
And he put no difference between them and us, but with faith purified their hearts.
Revelation 7:14
And I said unto him, "Lord, thou knowest." And he said unto me, "These are they which came out of great tribulation and made their garments large, and made them white in the blood of the lamb:

Third day

Numbers 31:19
And lodge without the host seven days, all that have killed any person and all that have touched any dead body, and purify both yourselves and your prisoners; the third day and the seventh.
Exodus 19:11
that they may be ready against the third day. For the third day the LORD will come down in the sight of all the people upon mount Sinai.
Leviticus 7:17
but as much of the offered flesh as remaineth unto the third day shall be burned with fire.
Hosea 6:2
He hath wounded us, and he shall bind us up again; after two days shall he quicken us, in the third day he shall raise us up, so that we shall live in his sight.
1 Corinthians 15:3
For first of all, I delivered unto you that which I received: how that Christ died for our sins, agreeing to the scriptures,

General references

Leviticus 7:19
The flesh that toucheth any unclean thing shall not be eaten, but burnt with fire: and all that be clean in their flesh, may eat flesh.
Ezekiel 44:26
And when he is cleansed, there shall be reckoned unto him seven days: