'Clean' in the Bible

Of every clean beast thou shalt take to thee by sevens, the male and his female: and of beasts that are not clean by two, the male and his female.

Of clean beasts, and of beasts that are not clean, and of fowls, and of every thing that creepeth upon the earth,

And Noah builded an altar unto the LORD; and took of every clean beast, and of every clean fowl, and offered burnt offerings on the altar.

Didn’t he himself say to me, ‘She is my sister’? And she herself said, ‘He is my brother.’ I did this with a clear conscience and clean hands.”

Then Jacob said unto his household, and to all that were with him, Put away the strange gods that are among you, and be clean, and change your garments: