Yes, the Bible does mention Christmas trees. In the Old Testament, the prophet Jeremiah prophesied about the coming of the Messiah, the savior of the world. He said that the Messiah would be a "Branch," meaning a tree-like figure who would bring salvation and healing to the world. In the New Testament, the apostle Paul also used the imagery of a tree to describe the Christian faith. He said that the cross of Jesus Christ was like a tree planted by a stream, whose roots go deep and whose branches reach high.