Pope Pius XII
Mystici Corporis Christi §109
Mystici Corporis Christi: On the Mystical Body of Christ
109 Before concluding, We cannot refrain from again and again exhorting all to love holy Mother Church with a devoted and active love. If we have really at heart the salvation of the whole human family, purchased by the precious Blood, we must offer every day to the Eternal Father our prayers, works and sufferings, for her safety and for her continued and ever more fruitful increase. And while the skies are heavy with storm clouds, and exceeding great dangers threaten the whole of human Society and the Church herself, let us commit ourselves and all that we have to the Father of Mercies, crying out: "Look down, we beseech Thee, Lord, on this Thy family, for which our Lord Jesus Christ did not hesitate to be betrayed into the hands of evil men and to undergo the torment of the Cross."
Source: Mystici Corporis Christi (Vatican.va)