While the theological “developed doctrine” of the Trinity is not explicitly laid out in the Books constituting the New Testament, the New Testament does contain a number of Trinitarian formulas, including (but not limited to): Matthew 28:19, 2 Corinthians 13:13, 1 Corinthians 12:4-5, Ephesians 4:4-6, 1 Peter 1:2 and Revelation 1:4-5. This does not include the multiple Typography formulas throughout the Old Testament (see Genesis, the story of the Noah’s Ark, etc).