Nowhere in Scripture does it admonish a believer to pray in the name of Mary or the Saints. Nowhere! Why is that so? Because we already have an intercessor that is part of the Triune God.
Why would any prayer be directed to Mary? She’s physically dead and cannot intercede for us. In fact it was the Holy Spirit that overshadowed Mary that allowed her to have a Divine birth. Prayers to Mary and the Saints are not biblical. You might as well say a prayer to Buddha. I don’t want to get the Catholics started on that one.