New Revised Standard Version
Those who believe in the Son of God have the testimony in their hearts. Those who do not believe in God have made him a liar by not believing in the testimony that God has given concerning his Son.

Contemporary English Version
If we have faith in God's Son, we have believed what God has said. But if we don't believe what God has said about his Son, it is the same as calling God a liar.

New American Bible
Whoever believes in the Son of God has this testimony within himself. Whoever does not believe God has made him a liar by not believing the testimony God has given about his Son.

Douay-Rheims Bible
He that believeth in the Son of God hath the testimony of God in himself. He that believeth not the Son maketh him a liar: because he believeth not in the testimony which God hath testified of his Son.

He that believeth in the Son of God hath the testimony of God in himself. He that believeth not the Son maketh him a liar: because he believeth not in the testimony which God hath testified of his Son.

that believeth on.

1 John 5:1 Whosoever believeth that Jesus is the Christ, is born of God. And every one that loveth him who begot, loveth him also who is born of him.

John 3:16 For God so loved the world, as to give his only begotten Son: that whosoever believeth in him may not perish, but may have life everlasting.

hath the.

Psalm 25:14 The Lord is a firmament to them that fear him: and his covenant shall be made manifest to them.

Proverbs 3:32 Want is from the Lord in the house of the wicked: but the habitations of the just shall be blessed.

Romans 8:16 For the Spirit himself giveth testimony to our spirit that we are the sons of God.

Galatians 4:6 And because you are sons, God hath sent the Spirit of his Son into your hearts, crying: Abba, Father.

Colossians 3:3 For you are dead: and your life is hid with Christ in God.

2 Peter 1:19 And we have the more firm prophetical word: whereunto you do well to attend, as to a light that shineth in a dark place, until the day dawn and the day star arise in your hearts.

Revelation 2:17,28 He that hath an ear, let him hear what the Spirit saith to the churches: To him that overcometh I will give the hidden manna and will give him a white counter: and in the counter, a new name written, which no man knoweth but he that receiveth it. . . .

hath made.

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

Numbers 23:19 God is not a man, that he should lie, nor is the son of man, that he should be changed. Hath he said then, and will he not do? hath he spoken, and will he not fulfil?

Job 24:25 And if it be not so, who can convince me that I have lied, and set my words before God?

Isaiah 53:1 Who a hath believed our report? and to whom is the arm of the Lord revealed?

Jeremiah 15:18 Why is my sorrow become perpetual, and my wound desperate so as to refuse to be healed? it is become to me as the falsehood of deceitful waters that cannot be trusted.

John 3:33 He that hath received his testimony hath set to his seal that God is true.

John 5:38 And you have not his word abiding in you: for whom he hath sent, him you believe not.

Hebrews 3:12 Take heed, brethren, lest perhaps there be in any of you an evil heart of unbelief, to depart from the living God.