Pope Paul VI
Sacerdotalis Caelibatus §95
Sacerdotalis Caelibatus: On the Celibacy of the Priest
95 We are certain, venerable brothers, that you will leave nothing undone to foster, by your teaching, prudence and pastoral zeal, the ideal of consecrated celibacy among your clergy. We are sure too that you will never neglect those priests who have strayed from the house of God, their true home, no matter where their painful odyssey has led them; for they still remain your sons.
Source: Sacerdotalis Caelibatus (Vatican.va)