"Stabat Mater Dolorosa" is a phrase used by Father McAteer.
The Stabat Mater is a 13th-century Christian hymn to Mary, which portrays her suffering as Jesus Christ's mother during his crucifixion. The title comes from its first line, "Stabat Mater dolorosa," which means "the sorrowful mother was standing." The hymn is sung at the liturgy on the memorial of Our Lady of Sorrows.