Anyone, then, who knows the right thing to do and fails to do it, commits sin.

The Bible (The New Testament) (AD 1st - 2nd C) Christian sacred scripture

James 4:17 [NRSV (2021 ed.)]
    (Source)

Alternate translations:

Therefore to him that knoweth to do good, and doeth it not, to him it is sin.
[KJV (1611)]

Everyone who knows what is the right thing to do and doesn't do it commits a sin.
[JB (1966)]

So then, if we do not do the good we know we should do, we are guilty of sin.
[GNT (1976)]

Everyone who knows what is the right thing to do and does not do it commits a sin.
[NJB (1985)]

It is a sin when someone knows the right thing to do and doesn’t do it.
[CEB (2011)]

If anyone, then, knows the good they ought to do and doesn't do it, it is sin for them.
[NIV (2011 ed.)]