Numbers 19:12

They must purify themselves with the water for purification on the third day and on the seventh day. Then they will be clean. But if they do not purify themselves on both the third and the seventh day, they will not be clean.

Numbers 31:19

Everyone who killed a person or touched a dead body must stay outside the camp seven days. You and your prisoners of war must use the ritual water on the third and seventh days in order to take away your sin.

Exodus 19:11

They should be ready in three days. I will descend to Mount Sinai, where all of them can see me.

Exodus 19:15

He said to the people: Get ready for the third day. Do not go near a woman for sexual intercourse.

Leviticus 7:17

Anything left over from the flesh of the sacrifice on the third day shall be burned.

Numbers 19:17-19

Do this for people who become unclean from touching a dead body. Put some of the ashes from the red cow that was burned as an offering for sin into a container. Then pour fresh water on them.

Psalm 51:7

Purify me from sin with hyssop, and I will be clean. Wash me, and I will be whiter than snow.

Ezekiel 36:25

I will sprinkle clean water on you and make you clean instead of unclean. Then I will cleanse you from all your idols.

Hosea 6:2

He will revive us after two days. He will raise us up on the third day that we will live before him.

Acts 15:9

He made no distinction between them and us and purified their hearts by faith.

1 Corinthians 15:3-4

First of all, I delivered to you what I also received, how Christ died for our sins according to the Scriptures.

Revelation 7:14

I said to him: Sir, you know. He said to me: These are the ones who came out of the great tribulation. They washed their robes, 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
Do this for people who become unclean from touching a dead body. Put some of the ashes from the red cow that was burned as an offering for sin into a container. Then pour fresh water on them.
Psalm 51:7
Purify me from sin with hyssop, and I will be clean. Wash me, and I will be whiter than snow.
Ezekiel 36:25
I will sprinkle clean water on you and make you clean instead of unclean. Then I will cleanse you from all your idols.
Acts 15:9
He made no distinction between them and us and purified their hearts by faith.
Revelation 7:14
I said to him: Sir, you know. He said to me: These are the ones who came out of the great tribulation. They washed their robes, and made them white in the blood of the Lamb.

Third day

Numbers 31:19
Everyone who killed a person or touched a dead body must stay outside the camp seven days. You and your prisoners of war must use the ritual water on the third and seventh days in order to take away your sin.
Exodus 19:11
They should be ready in three days. I will descend to Mount Sinai, where all of them can see me.
Leviticus 7:17
Anything left over from the flesh of the sacrifice on the third day shall be burned.
Hosea 6:2
He will revive us after two days. He will raise us up on the third day that we will live before him.
1 Corinthians 15:3
First of all, I delivered to you what I also received, how Christ died for our sins according to the Scriptures.

General references

Leviticus 7:19
The flesh that touches anything unclean shall not be eaten. It should be burned with fire. As for other flesh, anyone who is clean may eat such flesh.
Ezekiel 44:26
After a priest is made clean, he must wait seven days.