13 We thank you, Venerable Brethren, your priests and Faithful, who have persisted in their Christian duty and in the defense of God's rights in the teeth of an aggressive paganism. Our gratitude, warmer still and admiring, goes out to those who, in fulfillment of their duty, have been deemed worthy of sacrifice and suffering for the love of God.
Source: Mit Brennender Sorge (Vatican.va)