Proverbs 25:3-5

New Century Version

³ No one can measure the height of the skies or the depth of the earth.
    So also no one can understand the mind of a king.

⁴ Remove the scum from the silver,
    so the silver can be used by the silversmith.
⁵ Remove wicked people from the king’s presence;
    then his government will be honest and last a long time.