1 John 3:7

5 But you know that Christ appeared to take away sins, and in Him there is no sin.

6 No one who remains in Him keeps on sinning. No one who continues to sin has seen Him or known Him.

Little children, let no one deceive you: The one who practices righteousness is righteous, just as Christ is righteous.

8 The one who practices sin is of the devil, because the devil has been sinning from the very start. This is why the Son of God was revealed, to destroy the works of the devil.

9 Anyone born of God refuses to practice sin, because God’s seed abides in him; he cannot go on sinning, because he has been 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