106 We know, of course, that due to various conditions many of these beloved sons of Ours are frequently called upon to undertake the pastoral care of the faithful; and this has redounded to the benefit of the Christian name and Christian virtue. Although We are sure they need no such admonition, We again exhort these religious to meet the present-day needs of the people spontaneously and enthusiastically, cooperating zealously and energetically with the efforts of the other clergy.
Source: Ad Petri Cathedram (Vatican.va)