Apostolic Constitutions, Book V 3
1Receive also those that are persecuted on account of the faith, and who fly from city to city on account of the Lord's commandment; and assist them as martyrs, rejoicing that you are made partakers of their persecution, as knowing that they are esteemed blessed by the Lord; for Himself says: Blessed are you when men shall reproach you, and persecute you, and say all manner of evil against you falsely, for my sake. Rejoice, and be exceeding glad, because your reward is great in heaven: for so persecuted they the prophets which were before us. And again: If they have persecuted me, they will also persecute you. And afterwards: If they persecute you in this city, flee to another. For in the world you have tribulation: for they shall deliver you into the synagogues; and you shall be brought before rulers and kings for my sake, and for a testimony to them. And, He that endures unto the end, the same shall be saved. For he that is persecuted for the sake of the faith, and bears witness in regard to Him, Christ, and endures, is truly a man of God.