Bible Verses About Purifications: Insufficient for spiritual purification

If I have washed myself with snow-water, And purified with soap my hands,

Then in corruption Thou dost dip me, And my garments have abominated me.

But though thou dost wash with nitre, And dost multiply to thyself soap, Marked is thine iniquity before Me, An affirmation of the Lord Jehovah.