In Multiplicibus Curis §10

¹⁰ With reliance, then, on this hope, as a pledge of heavenly favors and in token of our affection, gladly in the Lord do we impart to you, Venerable Brethren, and to your flocks, as to all who will take this appeal of Ours to heart, Our Apostolic Benediction. Given at Castel Gandolfo, near Rome, on the 24th day of October, in the year 1948, the tenth of Our Pontificate.