King James Version (KJV)
James 4:17
“Therefore to him that knoweth to do good, and doeth [it] not, to him it is sin.”
Verse in context — James 4
15
For that ye [ought] to say, If the Lord will, we shall live, and do this, or that.
16
But now ye rejoice in your boastings: all such rejoicing is evil.
17
Therefore to him that knoweth to do good, and doeth [it] not, to him it is sin.