 bought into it and we can see here right away in this annunciation scene this is how we know that the rosary is in fact this is part of how we know that the rosary is a biblical prayer because the words of the hail mary which a lot of people say well why isn't more focused on christ well it is as we've said before but also it comes from scripture it is the very sacred word of god gabriel says to mary hail full of grace in verse 28.