Does the Bible sanction such prayers to Mary?

The Catholic Answers

Yes. All through the Bible you will find God conferring favors through the prayers of others. In the Old Testament we read of the prayers of Abraham, Moses, and of the various prophets. In the New Testament, St. James tells us to “pray for one another,” in the text I have just quoted. If we must always pray directly to God and may not ask the prayers of others, why did St. Paul write to the Thessalonians, “Pray for us that we may be delivered from importunate and evil men?” 2 Thess. III., 2. Why did he not ask that directly of God, instead of asking the prayers of the Thessalonians? Or would you be more scriptural than the New Testament itself?

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty