Mt 3:17, Mk 1:11, Lk 3:22, Mt 17:5, Acts 13:33, Heb 1:5, Heb 5:5
In the Old Testament, it was prophesied that God would give his Son the nations heirs and destroy all the nations. (Psalm 2:7-9)
Psalm 2:7 I will declare the decree: the Lord hath said unto me, Thou art my Son; this day have I begotten thee. 8 Ask of me, and I shall give thee the heathen for thine inheritance, and the uttermost parts of the earth for thy possession. 9 Thou shalt break them with a rod of iron; thou shalt dash them in pieces like a potter's vessel.
Jesus is the Son of God. (Matthew 3:17, Mark 1:11, Luke 3:22, Matt 17:5)
Matthew 3:17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
Mark 1:11 And there came a voice from heaven, saying, Thou art my beloved Son, in whom I am well pleased.
Luke 3:22 And the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said, Thou art my beloved Son; in thee I am well pleased.
Matt 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.
Paul proved that Jesus is the Son of God prophesied in Psalm 2. (Acts 13:33)
Acts 13:33 God hath fulfilled the same unto us their children, in that he hath raised up Jesus again; as it is also written in the second psalm, Thou art my Son, this day have I begotten thee.
The writer of Hebrews proved that Jesus is the Son of God. (Heb 1:5, Heb 5:5)
Heb 1:5 For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son?
Heb 5:5 So also Christ glorified not himself to be made an high priest; but he that said unto him, Thou art my Son, to day have I begotten thee.