Numbers 19:9

Then let a man who is clean take the dust of the burned cow and put it outside the tent-circle in a clean place, where it is to be kept for the children of Israel and used in making the water which takes away what is unclean: it is a sin-offering.

Numbers 19:13

Anyone touching the body of a dead man without making himself clean in this way, makes the House of the Lord unclean; and that man will be cut off from Israel: because the water was not put on him, he will be unclean; his unclean condition is unchanged.

Hebrews 9:13

For if the blood of goats and oxen, and the dust from the burning of a young cow, being put on the unclean, make the flesh clean:

Numbers 19:20-21

But the man who, being unclean, does not make himself clean in this way, will be cut off from the meeting of the people, because he has made the holy place of the Lord unclean: the water has not been put on him, he is unclean.

Leviticus 15:20

And everything on which she has been resting, while she is kept separate, will be unclean, and everything on which she has been seated will be unclean.

Numbers 6:12

And he will give to the Lord his days of being separate, offering a he-lamb of the first year as an offering for error: but the earlier days will be a loss, because he became unclean.

Numbers 8:7

And this is how you are to make them clean: let the holy water which takes away sin be put on them, and let the hair all over their bodies be cut off with a sharp blade, and let their clothing be washed and their bodies made clean.

Numbers 9:13

But the man who, not being unclean or on a journey, does not keep the Passover, will be cut off from his people: because he did not make the offering of the Lord at the regular time, his sin will be on him.

Numbers 19:18

And a clean person is to take hyssop and put it in the water, shaking it over the tent, and all the vessels, and the people who were there, and over him by whom the bone, or the body of one who has been put to death with the sword, or the body of one who has come to his end by a natural death, or the resting-place was touched.

Numbers 31:23-24

And anything which may be heated, is to go through the fire and be made clean; but in addition it is to be put in the water of cleaning: and anything which may not go through the fire is to be put in the water.

Zechariah 13:1

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.

2 Corinthians 5:21

For him who had no knowledge of sin God made to be sin for us; so that we might become the righteousness of God in him.

2 Corinthians 7:1

Because God, then, will give us such rewards, dear brothers, let us make ourselves clean from all evil of flesh and spirit, and become completely holy in the fear of God.

Hebrews 7:26

It was right for us to have such a high priest, one who is holy and without evil, doing no wrong, having no part with sinners, and made higher than the heavens:

Treasury of Scripture Knowledge

Summary

And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a water of separation: it is a purification for sin.

Lay them up

General references

Bible References

Clean

Numbers 19:18
And a clean person is to take hyssop and put it in the water, shaking it over the tent, and all the vessels, and the people who were there, and over him by whom the bone, or the body of one who has been put to death with the sword, or the body of one who has come to his end by a natural death, or the resting-place was touched.
Numbers 9:13
But the man who, not being unclean or on a journey, does not keep the Passover, will be cut off from his people: because he did not make the offering of the Lord at the regular time, his sin will be on him.
2 Corinthians 5:21
For him who had no knowledge of sin God made to be sin for us; so that we might become the righteousness of God in him.
Hebrews 7:26
It was right for us to have such a high priest, one who is holy and without evil, doing no wrong, having no part with sinners, and made higher than the heavens:
Hebrews 9:13
For if the blood of goats and oxen, and the dust from the burning of a young cow, being put on the unclean, make the flesh clean:

Lay them up

Numbers 19:17
And for the unclean, they are to take the dust of the burning of the sin-offering, and put flowing water on it in a vessel:

A water of separation

Leviticus 15:20
And everything on which she has been resting, while she is kept separate, will be unclean, and everything on which she has been seated will be unclean.
Zechariah 13:1
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.
2 Corinthians 7:1
Because God, then, will give us such rewards, dear brothers, let us make ourselves clean from all evil of flesh and spirit, and become completely holy in the fear of God.

General references

Leviticus 22:6
Any person touching any such unclean thing will be unclean till evening, and may not take of the holy food till his flesh has been bathed in water;
Numbers 19:18
And a clean person is to take hyssop and put it in the water, shaking it over the tent, and all the vessels, and the people who were there, and over him by whom the bone, or the body of one who has been put to death with the sword, or the body of one who has come to his end by a natural death, or the resting-place was touched.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain