The one believing on the Son of God has the witness in himself: the one not believing God has made him a liar; because he has not believed in the testimony which God has testified concerning his Son.

Then the Pharisees said to Him, Thou art testifying concerning thyself; Thy testimony is not true. And Jesus responded and said to them,

The father

And Jesus having been baptized, came up straightway from the water; and behold, the heavens were opened and He saw the Spirit of God, descending like a dove, coming on Him.

He still speaking, behold, a white cloud overshadowed them: and behold a voice out of the cloud, saying, This is my beloved Son, in whom I am delighted; hear ye Him.

Going, disciple all nations, baptizing them into the name of the Father and of the Son and of the Holy Ghost:

For as the Father hath life in Himself, so also He has given to His Son to have life also in Himself.

I am the one testifying concerning myself, and the Father having sent me, testifies concerning me.

If I do not the works of my Father, believe me not.

Father, glorify thy name. Then a voice came from heaven, I have indeed glorified thee, and will glorify thee again.

The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit, be with you all.

John to the seven churches which are in Asia: Grace to you, and peace, from the one who is, and who was, and who is coming; and from the seven Spirits which are before his throne;

The word

That which was from the beginning, which we have heard, which we have seen with our eyes, which we have beheld, and our hands have handled, concerning the Word of the life;

In the beginning was the Word, and the Word was with God, and the Word was God.

For the word of God is living, and powerful, and sharper than any two-edged sword, and piercing unto the dividing of soul and spirit, of both joints and marrow, and a quick discerner of the thoughts and intents of the heart.

and being clothed with a garment sprinkled with blood: and his name has been called, The Word of God.

The holy

He is the one having come through water and blood, Jesus Christ; not by water only, but by water and blood; the Spirit is the one who bears witness, because the Spirit is the truth.

And Jesus having been baptized, came up straightway from the water; and behold, the heavens were opened and He saw the Spirit of God, descending like a dove, coming on Him.

And I did not know Him, but the One having sent me to baptize with water, He said to me, On whom you may see the Spirit descending and remaining on Him, He is the one baptizing with the Holy Ghost.

Therefore on the right hand of God exalted, and having received from the Father the promise of the Holy Spirit, has poured out this which you both see and hear.

And we are witnesses of these words, and the Holy Ghost, whom God has given to those who obey him.

how shall we escape, having neglected so great a salvation? which having received the beginning to be spoken by the Lord, was confirmed unto us by those who heard it;

And these

Going, disciple all nations, baptizing them into the name of the Father and of the Son and of the Holy Ghost:

I and the Father are one.

General references

I and the Father are one.