1 John 2:4
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
In other versions
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him;
ASV
The man who says, I have knowledge of him, and does not keep his laws, is false, and there is nothing true in him:
BBE
He that says, I know him, and does not keep his commandments, is a liar, and the truth is not in him;
DBY
One who says, "I know him," and doesn't keep his commandments, is a liar, and the truth isn't in him.
WEB
he who is saying, `I have known him,' and his command is not keeping, a liar he is, and in him the truth is not;
YLT
He that says, I know him, and keeps not his commandments, is a liar, and the truth is not in him.
ENG
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
WBT
If anyone says, “I know Him,” but does not keep His commandments, he is a liar, and the truth is not in him.
BSB
In context
2And he is the propitiation for our sins: and not for our's only, but also for the sins of the whole world.
3And hereby we do know that we know him, if we keep his commandments.
4He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
5But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
6He that saith he abideth in him ought himself also so to walk, even as he walked.