In His Word God has revealed that He is Triune, in other words, He is three distinct Persons in one divine Being. These are: Father, Son and Holy Spirit.
Deut. 6:4: The Lord our God is one Lord.
1 Cor. 8:4: There is none other God but one.
Matt. 28:19: Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost.
2 Cor. 13:14: The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Ghost, be with you all.
Assignment: Read Matt. 3:16-17: Jesus is baptized, Is. 42:1: (The Lord, the Lord’s Servant, and the Lord’s Spirit), and Num. 6:24-27 (In the Lord’s Blessing the name of the Lord is pronounced three times over the Israelites).