From Genesis 1:1-2:4a
Finally, brothers and sisters, farewell. Put things in order, listen to my appeal, agree with one another, live in peace; and the God of love and peace will be with you. Greet one another with a holy kiss. All the saints greet you. The grace of the Lord Jesus Christ, the love of God, and the communion of the Holy Spirit be with all of you.
The eleven disciples went to Galilee, to the mountain to which Jesus had directed them. When they saw him, they worshiped him; but some doubted. And Jesus came and said to them, “All authority in heaven and on earth has been given to me. Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything that I have commanded you. And remember, I am with you always, to the end of the age.”
But the whole three Persons are co-eternal together and co-equal.
So that in all things, as is aforesaid, the Unity in Trinity and the Trinity in Unity is to be worshipped.
He therefore that will be saved is must think thus of the Trinity.