Psalm 51:2

Wash me thoroughly from my iniquity
And cleanse me from my sin.

Psalm 51:7

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

Isaiah 1:16

Wash yourselves, make yourselves clean;
Remove the evil of your deeds from My sight.
Cease to do evil,

Ezekiel 36:25

Then I will sprinkle clean water on you, and you will be clean; I will cleanse you from all your filthiness and from all your idols.

Acts 22:16

Now why do you delay? Get up and be baptized, and wash away your sins, calling on His name.’

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 released us from our sins by His blood—

Jeremiah 4:14

Wash your heart from evil, O Jerusalem,
That you may be saved.
How long will your wicked thoughts
Lodge within you?

1 Corinthians 6:11

Such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ and in the Spirit of our God.

Hebrews 10:21-22

and since we have a great priest over the house of God,

Revelation 7:14

I said to him, “My lord, you know.” And he said to me, “These are the ones who come out of the great tribulation, and they have washed their robes and made them white in the blood of the Lamb.

Psalm 19:12

Who can discern his errors? Acquit me of hidden faults.

Zechariah 13:1

“In that day a fountain will be opened for the house of David and for the inhabitants of Jerusalem, for sin and for impurity.

Hebrews 9:13-14

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,

1 John 1:7-9

but if we walk in the Light as He Himself is in the Light, we have fellowship with one another, and the blood of Jesus His Son cleanses us from all sin.

Treasury of Scripture Knowledge

Summary

Wash me throughly from mine iniquity, and cleanse me from my sin.

Bible References

Cleanse

Psalm 51:7
Purify me with hyssop, and I shall be clean;
Wash me, and I shall be whiter than snow.
Psalm 19:12
Who can discern his errors? Acquit me of hidden faults.

General references

Leviticus 15:5
Anyone, moreover, who touches his bed shall wash his clothes and bathe in water and be unclean until evening;
Leviticus 16:30
for it is on this day that atonement shall be made for you to cleanse you; you will be clean from all your sins before the Lord.
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.