The Trinity

One God in three persons: Father, Son and Holy Spirit.

Therefore go and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit,
Matthew 28:19

The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with all of you.
2 Corinthians 13:14

Hear, O Israel: The LORD our God, the LORD is One.
Deuteronomy 6:4

In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through Him all things were made, and without Him nothing was made that has been made.
John 1:1–3

And I will ask the Father, and He will give you another Advocate to be with you forever— the Spirit of truth. The world cannot receive Him, because it neither sees Him nor knows Him. But you do know Him, for He abides with you and will be in you.
John 14:16–17

But the Advocate, the Holy Spirit, whom the Father will send in My name, will teach you all things and will remind you of everything I have told you.
John 14:26

Blessed be the God and Father of our Lord Jesus Christ, who has blessed us in Christ with every spiritual blessing in the heavenly realms. For He chose us in Him before the foundation of the world to be holy and blameless in His presence. In love He predestined us for adoption as His sons through Jesus Christ, according to the good pleasure of His will, to the praise of His glorious grace, which He has freely given us in the Beloved One. In Him we have redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace that He lavished on us with all wisdom and understanding. …
Ephesians 1:3–14