23 In token of these blessings, and in pledge of our paternal affection, We impart from a full heart the Apostolic Benediction to each of you, Venerable Brethren, to all those who make generous answer to this our letter of exhortation, and particularly to the numerous throngs of our most dear children. Given at Rome at St. Peter's, the first day of May of the year 1948, the tenth of our Pontificate.
Source: Auspicia Quaedam (Vatican.va)