22 As a pledge of heavenly favors and in testimony of Our good-will, we lovingly impart the Apostolic Benediction to you, Venerable Brethren, and to your clergy and people. Given at St. Peter's, Rome, on the fifteenth day of June, on the Feast of the Sacred Heart of Jesus in the year nineteen hundred and seventeen, in the third of Our Pontificate.
Source: Humani Generis Redemptionem (Vatican.va)