Pope Paul VI
Christi Matri §14
Christi Matri: On Prayers for Peace During October
14 With confidence that the exalted Mother of God will graciously hear Our humble prayer, We lovingly impart the apostolic blessing to you, venerable brethren, and to the clergy and people committed to your care. Given at St. Peter's, Rome, on the 15th day of September, in the year 1966, the fourth of Our pontificate.
Source: Christi Matri (Vatican.va)