Numbers 19:9

And a man that is clean shall gather up the ashes of the heifer, and lay them up outside the camp in a clean place, and it shall be kept for the congregation of the sons of Israel for a water of separation. It is a cleansing for sin.

Numbers 19:13

Whoever touches the dead body of any man that is dead, and does not purify himself, defiles the tabernacle of Jehovah. And that soul shall be cut off from Israel. Because the water of separation was not sprinkled upon him, he shall be unclean. His uncleanness is still upon him.

Hebrews 9:13

For if the blood of bulls and of goats and the ashes of a heifer sprinkling the unclean sanctifies to the purifying of the flesh,

Numbers 19:20-21

But the man that shall be unclean, and shall not purify himself, that soul shall be cut off from among the congregation, because he has defiled the sanctuary of Jehovah. The water of separation has not been sprinkled upon him. He is unclean.

Leviticus 15:20

And everything that she lies on in her impurity shall be unclean. Everything also that she sits on shall be unclean.

Numbers 6:12

And he shall set apart to Jehovah the days of his separation, and shall bring a lamb of the first year for a guilt offering. But the former days shall be lost, because his separation was defiled.

Numbers 8:7

And in this way shall you do to them to purify them. Sprinkle water of sin-offering on them, and let them shave all their flesh and wash their clothes, and make themselves clean.

Numbers 9:13

But the man that is clean, and is not in a journey, and holds back from preparing the Passover, even the same soul shall be cut off from among his people. Because he did not bring the offering of Jehovah in His appointed time, that man shall bear his sin.

Numbers 19:18

And a clean person shall take hyssop and dip in the water, and sprinkle upon the tent and upon all the vessels, and upon the persons that were there, and upon him that touched a bone, or one killed, or one dead, or a grave.

Numbers 31:23-24

everything that can stand the fire, you shall make go through the fire, and it shall be clean. Only it shall be purified with the water of separation. And all that cannot stand the fire you shall make go through the water.

Zechariah 13:1

In that day there shall be a fountain opened to the house of David, and to the people of Jerusalem, for sin and for uncleanness.

2 Corinthians 5:21

For He has made Him who knew no sin, to be sin for us, that we might become the righteousness of God in Him.

2 Corinthians 7:1

Then having these promises, dearly beloved, let us cleanse ourselves from all defilements of flesh and spirit, perfecting holiness in the fear of God.

Hebrews 7:26

For such a high priest became us, who is holy, harmless, undefiled, separate from 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 shall take hyssop and dip in the water, and sprinkle upon the tent and upon all the vessels, and upon the persons that were there, and upon him that touched a bone, or one killed, or one dead, or a grave.
Numbers 9:13
But the man that is clean, and is not in a journey, and holds back from preparing the Passover, even the same soul shall be cut off from among his people. Because he did not bring the offering of Jehovah in His appointed time, that man shall bear his sin.
2 Corinthians 5:21
For He has made Him who knew no sin, to be sin for us, that we might become the righteousness of God in Him.
Hebrews 7:26
For such a high priest became us, who is holy, harmless, undefiled, separate from sinners and made higher than the heavens,
Hebrews 9:13
For if the blood of bulls and of goats and the ashes of a heifer sprinkling the unclean sanctifies to the purifying of the flesh,

Lay them up

Numbers 19:17
And for the unclean they shall take of the ashes of the burnt heifer of cleansing for sin, and running water shall be put to it in a vessel.

A water of separation

Leviticus 15:20
And everything that she lies on in her impurity shall be unclean. Everything also that she sits on shall be unclean.
Zechariah 13:1
In that day there shall be a fountain opened to the house of David, and to the people of Jerusalem, for sin and for uncleanness.
2 Corinthians 7:1
Then having these promises, dearly beloved, let us cleanse ourselves from all defilements of flesh and spirit, perfecting holiness in the fear of God.

General references

Leviticus 22:6
the soul which has touched it shall be unclean until evening. And he shall not eat of the holy things unless he washes his flesh with water.
Numbers 19:18
And a clean person shall take hyssop and dip in the water, and sprinkle upon the tent and upon all the vessels, and upon the persons that were there, and upon him that touched a bone, or one killed, or one dead, or a grave.