Go ye therefore, and teach all nations, baptizing them in the name …

And Jesus, when he was baptized, went up straightway out of the water... and he saw the Spirit of God descending like a dove... And lo a voice from heaven, saying, This is my beloved Son. (Matthew 3:16-17)

Matthew 3:16 (KJV)

Hear, O Israel: The LORD our God is one LORD. (Deuteronomy 6:4)

Deuteronomy 6:4 (KJV)

And God said, Let us make man in our image, after our likeness. (Genesis 1:26)

Genesis 1:26 (KJV)

For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. (1 John 5:7)

1 John 5:7 (KJV)

In the beginning was the Word, and the Word was with God, and the Word was God. (John 1:1)

John 1:1 (KJV)

Why hath Satan filled thine heart to lie to the Holy Ghost... thou hast not lied unto men, but unto God. (Acts 5:3-4) — equating the Holy Ghost with God.

Acts 5:3 (KJV)