Where in Scripture does it show that "Mary gave you the rosary?"
I believe it's contained in the book of Wisdom, just after the verse where the angel gifted Peter with the first Bingo card; and just before the chapter that gives the correct designs for the mitre and crook.
I was addressing my post to a fellow Catholic. I don’t expect Protestants to believe that the BVM appeared to St. Dominic and instructed him on the use of the rosary. Which by the way is for Catholics a private devotion and not something one has to do.
My suggestion to Protestants was to use the rosary as a way to meditate on the life of Christ while reciting the Psalms. The beads were first used as a way of keeping track of the Psalms said.