Pope Paul VI
Sacerdotalis Caelibatus §91
Sacerdotalis Caelibatus: On the Celibacy of the Priest
91 There is an irreplaceable and very effective means to ensure for our dear priests an easier and happier way of being faithful to their obligations, and it is one which they have the right and duty to find in you, venerable brother bishops. It was you who called them and destined them to be priests; it was you who placed your hands on their heads; with you they are one in sharing the honor of the priesthood by virtue of the Sacrament of Orders; it is you whom they make present in the community of the faithful; with you they are united in a spirit of trust and generosity since, in as far as is compatible with their order, they take upon themselves your duties and concerns. (137) In choosing a life dedicated to celibacy they follow the ancient examples of the prelates of the East and West; this provides a new motive for union between bishop and priest and a sound hope that they will live together more closely.
Source: Sacerdotalis Caelibatus (Vatican.va)