WEB
He who believes in the Son of God has the testimony in himself. He who doesn’t believe God has made him a liar, because he has not believed in the testimony that God has given concerning his Son.
YLT
He who is believing in the Son of God, hath the testimony in himself; he who is not believing God, a liar hath made Him, because he hath not believed in the testimony that God hath testified concerning His Son;
F.O.G Original
The one believing in the Son of the Elohim has the testimony in himself. The one not believing the Elohim has made Him a liar, because he has not believed in the testimony that the Elohim has given concerning His Son.
F.O.G
The one believing in the Son of the Elohim has the testimony in himself. The one not believing the Elohim has made Him a liar, because he has not believed in the testimony that the Elohim has given concerning His Son.
F.O.G MSG
¹⁰Whoever believes in the Son of God accepts this testimony. Whoever does not believe God has made Him out to be a liar, because they have not believed the testimony God has given about His Son.