1 John 1:10

1:10 If we say we have not sinned, we make him a liar and his word is not in us.

1 John 5:10

5:10 (The one who believes in the Son of God has the testimony in himself; the one who does not believe God has made him a liar, because he has not believed in the testimony that God has testified concerning his Son.) ¹ 

[5:10]  ¹ sn This verse is a parenthesis in John’s argument.