1 John 3:7

5 And ye know that he was manifested to take away our sins; and in him is no sin.

6 Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.

Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous.

8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.

9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
Little children, let no one deceive you: The one who practices righteousness is righteous, just as Christ is righteous.
KJV
Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous.
WEB
Little children, let no one lead you astray. He who does righteousness is righteous, even as he is righteous.
ASV
[My] little children, let no man lead you astray: he that doeth righteousness is righteous, even as he is righteous:
DARBY
Children, let no man lead you astray; he that practises righteousness is righteous, even as *he* is righteous.
BLB
Little children, let no one lead you⁺ astray; the one doing righteousness is righteous, just as He is righteous.
ÅB
Mine barn! la ikke noen forføre dere! den som gjør rettferdighet, er rettferdig, slik som han er rettferdig.
OTB
Små barn, la ingen føre dere vill; den som praktiserer rettferdighet er rettferdig, slik som Han er rettferdig;
B1930
Mine barn! la ikke nogen forføre eder! den som gjør rettferdighet, er rettferdig, likesom han er rettferdig.

Study notes (Tyndale)

Original text and word study

Cross references