International Standard Version The person who practices sin belongs to the evil one, because the devil has been sinning from the beginning. The reason that the Son of God was revealed was to destroy what the devil has been doing.
American Standard Version he that doeth sin is of the devil; for the devil sinneth from the beginning. To this end was the Son of God manifested, that he might destroy the works of the devil.
Young's Literal Translation he who is doing the sin, of the devil he is, because from the beginning the devil doth sin; for this was the Son of God manifested, that he may break up the works of the devil;