Beate Pastor Petre, clemens accipe; O Peter, Shepherd Good, Our Voices Sing of Thee
Hymn for Lauds on 18 January, feast of Saint Peter's Chair at Rome; on 22 February, feast of Saint Peter's Chair at Antioch; and on 29 June, feast of Saints Peter and Paul, when the hymns and are combined into one hymn.
It is attributed to Elpis, Boethius's wife, who died about 493.
The English title given is from the translation by T. Ball.
New Catholic Dictionary