Hebrews 9:13

For if the blood of goats and bulls and the ashes of a heifer sprinkling those who have been defiled sanctify for the cleansing of the flesh,

Leviticus 16:14-16

Moreover, he shall take some of the blood of the bull and sprinkle it with his finger on the mercy seat on the east side; also in front of the mercy seat he shall sprinkle some of the blood with his finger seven times.

Numbers 8:7

Thus you shall do to them, for their cleansing: sprinkle purifying water on them, and let them use a razor over their whole body and wash their clothes, and they will be clean.

Numbers 19:2-21

“This is the statute of the law which the Lord has commanded, saying, ‘Speak to the sons of Israel that they bring you an unblemished red heifer in which is no defect and on which a yoke has never been placed.

2 Chronicles 30:19

everyone who prepares his heart to seek God, the Lord God of his fathers, though not according to the purification rules of the sanctuary.”

Psalm 51:7

Purify me with hyssop, and I shall be clean;
Wash me, and I shall be whiter than snow.

Acts 15:9

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

1 Peter 1:22

Since you have in obedience to the truth purified your souls for a sincere love of the brethren, fervently love one another from the heart,

Treasury of Scripture Knowledge

Summary

For if the blood of bulls and of goats, and the ashes of an heifer sprinkling the unclean, sanctifieth to the purifying of the flesh:

Bible References

If

Leviticus 16:14
Moreover, he shall take some of the blood of the bull and sprinkle it with his finger on the mercy seat on the east side; also in front of the mercy seat he shall sprinkle some of the blood with his finger seven times.

The purifying

Numbers 8:7
Thus you shall do to them, for their cleansing: sprinkle purifying water on them, and let them use a razor over their whole body and wash their clothes, and they will be clean.
Numbers 19:12
That one shall purify himself from uncleanness with the water on the third day and on the seventh day, and then he will be clean; but if he does not purify himself on the third day and on the seventh day, he will not be clean.
2 Chronicles 30:19
everyone who prepares his heart to seek God, the Lord God of his fathers, though not according to the purification rules of the sanctuary.”
Psalm 51:7
Purify me with hyssop, and I shall be clean;
Wash me, and I shall be whiter than snow.
Acts 15:9
and He made no distinction between us and them, cleansing their hearts by faith.
1 Peter 1:22
Since you have in obedience to the truth purified your souls for a sincere love of the brethren, fervently love one another from the heart,

General references

Exodus 12:7
Moreover, they shall take some of the blood and put it on the two doorposts and on the lintel of the houses in which they eat it.
Leviticus 4:16
Then the anointed priest is to bring some of the blood of the bull to the tent of meeting;
Leviticus 16:14
Moreover, he shall take some of the blood of the bull and sprinkle it with his finger on the mercy seat on the east side; also in front of the mercy seat he shall sprinkle some of the blood with his finger seven times.
Numbers 19:21
So it shall be a perpetual statute for them. And he who sprinkles the water for impurity shall wash his clothes, and he who touches the water for impurity shall be unclean until evening.
Jeremiah 33:8
I will cleanse them from all their iniquity by which they have sinned against Me, and I will pardon all their iniquities by which they have sinned against Me and by which they have transgressed against Me.
Ezekiel 44:26
After he is cleansed, seven days shall elapse for him.