What Does “Most Holy Trinity” Mean in the Bible?
One God in three persons: Father, Son and Holy Spirit. It is the central mystery of our faith.
Where it appears in the Bible
Matthew 28:19
What the Bible says
Matthew 28:19
Going therefore, teach ye all nations; baptizing them in the name of the Father, and of the Son, and of the Holy Ghost.
Douay-Rheims Bible (Challoner revision), public domain.
Source: Catechism 234 and 253