55 After conversing with you, Venerable Brethren, on the most important and typical needs of the Church in mission countries, We cannot fail to express Our heartfelt gratitude to all those who are toiling for the propagation of the Faith in the farthest reaches of the earth, without sparing any efforts. For the missionaries from both the religious and the regular clergy; for the holy virgins who are fruitfully and actively helping the missions; and for the lay missionaries, precious allies of the clergy, who have been diligent in helping to advance the cause of religion—for all of them, We offer Our daily and special prayers, and every kind of help that lies within Our power. The success of their work, which is apparent in the spiritual vigor of newly established Christian communities, is an indication of God's favor and a proof of the solicitude and wisdom with which the Sacred Congregation for the Propagation of the Faith and the Congregation of the Oriental Church are carrying out their work.
Source: Princeps Pastorum (Vatican.va)