'Clean' in the Bible

The fear of Jehovah is clean, enduring for ever: The ordinances of Jehovah are true, and righteous altogether.

He that hath clean hands, and a pure heart; Who hath not lifted up his soul unto falsehood, And hath not sworn deceitfully.

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

Create in me a clean heart, O God; And renew a right spirit within me.

Is his lovingkindness clean gone for ever? Doth his promise fail for evermore?