Perpetual virginity of Mary

The Perpetual Virginity of Mary

Wikipedia. The apocryphal gospel of James preserves this belief of the early church.
Not a "teaching found explicitly in the Bible." But there are other teachings not found explicitly and literally in the Bible:
- "All teachings must be found in the Bible" is not a teaching found in the Bible.
- "The Bible" never uses the word "Bible" to mean what we mean by the word: "a combination of both Old and New Testament Scriptures."
- The list of books that are to be treated as "the Word of God" are not listed by any of the books of the Bible.