Psalm 51:7

Thou wilt purify me with hyssop, and I shall be clean: thou wilt wash me and I shall be white above snow.

Isaiah 1:18

Come now we will confute together Jehovah will say: if your sins shall be as deep scarlet, they shall be white as snow; if they shall be red as crimson, they shall be as wool.

Hebrews 9:19

For every command spoken according to law by Moses, to all the people, having taken the blood of calves and he-goats, with water, and scarlet wool, and hyssop, and also the book, and he sprinkled all the people,

1 John 1:7

But if we walk in the light, as he is in the light, we have communion with one another, and the blood of Jesus Christ cleanses us from every sin.

Exodus 12:22

And take ye a bundle of hyssop, and dip in the blood that is upon the threshhold, and touch upon the lintel, and upon the two door-posts from the blood which is upon the threshhold and ye shall not come forth each from the door of his house till morning.

Leviticus 14:4-7

And the priest commanded, and took for him being cleansed, two clean living birds, and cedar wood, and double scarlet, and hyssop.

Leviticus 14:49-52

And he took to cleanse the house two birds, and cedar wood, and double scarlet, and hyssop.

Numbers 19:18-20

And a clean man took hyssop and dipped in water and sprinkled upon the tent, and upon all the vessels, and upon the souls which were there, and upon him touching upon a bone, or upon the wounded, or upon the the dead, or upon a grave:

Ephesians 5:26-27

That he might consecrate it, having cleansed by the washing of water in the word,

Hebrews 9:13-14

For if the blood of bulls and he-goats, and the ashes of a heifer besprinkling the polluted, consecrates to the purity of the flesh:

Revelation 1:5

And from Jesus Christ, the faithful witness, the first born from the dead, and the chief of the kings of the earth. To him having loved us, and washed us from our sins in his blood,

Revelation 7:13-14

And one of the elders answered, saying to me, These having put round white robes, who are they? and whence came they

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
And the priest commanded, and took for him being cleansed, two clean living birds, and cedar wood, and double scarlet, and hyssop.
Numbers 19:18
And a clean man took hyssop and dipped in water and sprinkled upon the tent, and upon all the vessels, and upon the souls which were there, and upon him touching upon a bone, or upon the wounded, or upon the the dead, or upon a grave:
Hebrews 9:19
For every command spoken according to law by Moses, to all the people, having taken the blood of calves and he-goats, with water, and scarlet wool, and hyssop, and also the book, and he sprinkled all the people,

And

Hebrews 9:13
For if the blood of bulls and he-goats, and the ashes of a heifer besprinkling the polluted, consecrates to the purity of the flesh:
1 John 1:7
But if we walk in the light, as he is in the light, we have communion with one another, and the blood of Jesus Christ cleanses us from every sin.
Revelation 1:5
And from Jesus Christ, the faithful witness, the first born from the dead, and the chief of the kings of the earth. To him having loved us, and washed us from our sins in his blood,

Whiter

Isaiah 1:18
Come now we will confute together Jehovah will say: if your sins shall be as deep scarlet, they shall be white as snow; if they shall be red as crimson, they shall be as wool.
Ephesians 5:26
That he might consecrate it, having cleansed by the washing of water in the word,
Revelation 7:13
And one of the elders answered, saying to me, These having put round white robes, who are they? and whence came they

General references

Leviticus 15:5
And a man who shall touch upon his bed, shall cleanse his garments and shall wash in water, and be unclean till evening.
Leviticus 16:30
For in that day he shall expiate for you, to cleanse you from all your sins: before Jehovah shall ye be clean.
Numbers 19:6
And the priest took cedar wood and hyssop and double scarlet, and cast into the midst of the burning of the heifer.