'Clean' in the Bible

“For you have said, ‘My teaching (doctrine) [that God knowingly afflicts the righteous] is pure,And I am innocent in your eyes.’

“Who can make a clean thing out of the unclean?No one!

“What is man, that he should be pure and clean,Or he who is born of a woman, that he should be righteous and just?

“Behold, God puts no trust in His holy ones (angels);Indeed, the heavens are not pure in His sight—

“Nevertheless the righteous will hold to his ways,And he who has clean hands will grow stronger and stronger.

“How then can man be justified and righteous with God?Or how can he who is born of a woman be pure and clean?

‘I am pure, without transgression;I am innocent and there is no guilt in me.