The bible references to scriptures were all about sacred scriptures. The word bible comes from the Greek biblos, or book. It’s a matter of synonyms. In the Old Testament a book and a scroll were the same thing (sefer).
This isn’t like “trinity” for which there really isn’t even a synonym in the bible. It’s an okay theological term but shouldn’t be regarded as direct scriptural.
The Christian doctrine of the Trinity (from Latin trinitas "triad", from trinus "threefold")[1] defines God as three consubstantial persons,[2] expressions, or hypostases:[3] the Father, the Son (Jesus Christ), and the Holy Spirit; "one God in three persons". The three persons are distinct, yet are one "substance, essence or nature".[4] In this context, a "nature" is what one is, while a "person" is who one is.[5][6][7]
According to this central mystery of most Christian faiths,[8] there is only one God in three persons: while distinct from one another in their relations of origin (as the Fourth Lateran Council declared, "it is the Father who generates, the Son who is begotten, and the Holy Spirit who proceeds") and in their relations with one another, they are stated to be one in all else, co-equal, co-eternal and consubstantial, and "each is God, whole and entire".[9] Accordingly, the whole work of creation and grace is seen as a single operation common to all three divine persons, in which each shows forth what is proper to him in the Trinity, so that all things are "from the Father", "through the Son" and "in the Holy Spirit".[10]
Terms such as "monotheism", "incarnation", "omnipotence", are not found in the Bible, but they denote theological concepts concerning Christian faith that are believed to be contained in the Bible. Even the term "Bible" is not found in the Bible. "Trinity" is another such term. http://en.wikipedia.org/wiki/Trinity