His Son. (1 Jn 5:9-10) Mt 3:16-17, Mt 17:5, Jn 1:33-34, Jn 12:28-30, Jn 5:37, Jn 8:18
God testifies that Jesus is the Son of God. (1 John 5:9-10, Matthew 3:16-17, Matthew 17:5, John 1:33-34, John 5:37, John 8:18)
1 John 5:9 If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son. 10 He that believeth on the Son of God hath the witness in himself: he that believeth not God hath made him a liar; because he believeth not the record that God gave of his Son. Matthew 3:16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him: 17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
Matthew 17:5 While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.
John 1:33 And I knew him not: but he that sent me to baptize with water, the same said unto me, Upon whom thou shalt see the Spirit descending, and remaining on him, the same is he which baptizeth with the Holy Ghost. 34 And I saw, and bare record that this is the Son of God.
John 5:37 And the Father himself, which hath sent me, hath borne witness of me. Ye have neither heard his voice at any time, nor seen his shape.
John 8:18 I am one that bear witness of myself, and the Father that sent me beareth witness of me.
Jesus, the Son of God, glorified God by doing the work of Christ for us. (John 12:28-30)
John 12:28 Father, glorify thy name. Then came there a voice from heaven, saying, I have both glorified it, and will glorify it again. 29 The people therefore, that stood by, and heard it, said that it thundered: others said, An angel spake to him. 30 Jesus answered and said, This voice came not because of me, but for your sakes.