Scripture means sacred writings. All scripture is sacred because it comes from mouth of God. In my previous comments, I proved how all apostle writings are also Scripture. (Comment #41)
The thing is, Mary is never called "Mother of God " in Scriptures.
Rather, she is called “mother of Jesus” ,“mother of my Lord”.
Then again, you fail to explain how Catholic and other denominational practices like infant baptism makes sense. The Bible is the Holy Word of God. It is not a “Catholic-based” book. Like the Pharisees of old, traditions of men are elevated above the word of God - Matthew 15:8-9. Where else will things then go, but downhill?
Try not to cherry-pick my statements but rather show how “Hail Mary” is based on Scripture, since the only infallible interpreter of Scripture is Scripture.