Psalm 51:7

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

Isaiah 1:18

Come now, and let us reason together, says LORD, though your sins be as scarlet, they shall be as white as snow. Though they be red like crimson, they shall be as wool.

Hebrews 9:19

For of every commandment according to law that was spoken by Moses to all the people, after taking the blood of the calves and goats, with water and scarlet wool and hyssop, he sprinkled both the book itself and all the people,

1 John 1:7

But if we walk in the light, as he is in the light, we have fellowship with each other, and the blood of Jesus Christ his Son cleanses us from every sin.

Exodus 12:22

And ye shall take a bunch of hyssop, and dip it in the blood that is in the basin, and strike the lintel and the two side-posts with the blood that is in the basin, and none of you shall go out of the door of his house until the mo

Leviticus 14:4-7

then the priest shall command to take two living clean birds, and cedar wood, and scarlet, and hyssop for him who is to be cleansed.

Leviticus 14:49-52

And he shall take two birds, and cedar wood, and scarlet, and hyssop to cleanse the house.

Numbers 19:18-20

And a clean man shall take hyssop, and dip it in the water, and sprinkle it upon the tent, and upon all the vessels, and upon the souls who were there, and upon him who touched the bone, or the slain, or the dead, or the grave.

Ephesians 5:26-27

so that he might sanctify it, having cleansed it with the washing of water by the word,

Hebrews 9:13-14

For if the blood of bulls and goats, and the ashes of a heifer, sprinkling those who were defiled, sanctifies for the purification of the flesh,

Revelation 1:5

and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him who loves us and washed us from our sins by his blood

Revelation 7:13-14

And one of the elders answered, saying to me, Who are these who are clothed in white robes, and where did they come from?

Treasury of Scripture Knowledge

Summary

Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow.

Bible References

Purge

Leviticus 14:4
then the priest shall command to take two living clean birds, and cedar wood, and scarlet, and hyssop for him who is to be cleansed.
Numbers 19:18
And a clean man shall take hyssop, and dip it in the water, and sprinkle it upon the tent, and upon all the vessels, and upon the souls who were there, and upon him who touched the bone, or the slain, or the dead, or the grave.
Hebrews 9:19
For of every commandment according to law that was spoken by Moses to all the people, after taking the blood of the calves and goats, with water and scarlet wool and hyssop, he sprinkled both the book itself and all the people,

And

Hebrews 9:13
For if the blood of bulls and goats, and the ashes of a heifer, sprinkling those who were defiled, sanctifies for the purification of the flesh,
1 John 1:7
But if we walk in the light, as he is in the light, we have fellowship with each other, and the blood of Jesus Christ his Son cleanses us from every sin.
Revelation 1:5
and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him who loves us and washed us from our sins by his blood

Whiter

Isaiah 1:18
Come now, and let us reason together, says LORD, though your sins be as scarlet, they shall be as white as snow. Though they be red like crimson, they shall be as wool.
Ephesians 5:26
so that he might sanctify it, having cleansed it with the washing of water by the word,
Revelation 7:13
And one of the elders answered, saying to me, Who are these who are clothed in white robes, and where did they come from?

General references

Leviticus 15:5
And whoever touches his bed shall wash his clothes, and bathe himself in water, and be unclean until the evening.
Leviticus 16:30
For on this day atonement shall be made for you, to cleanse you. Ye shall be clean from all your sins before LORD.
Numbers 19:6
And the priest shall take cedar-wood, and hyssop, and scarlet, and cast it into the midst of the burning of the heifer.