Bede : And I separated twelve of the chiefs of the priests, etc. It has been frequently said that the silver and gold and vessels sent from Babylon to Jerusalem signify souls, which are converted to the Lord from the confusion and errors of this world. Hence, Ezra appropriately entrusts such vessels to the priests, who are to carry them to Jerusalem; for it is necessary that through the hands of the priests, those who desire to reach the companionship of the holy Church are washed in baptism and consecrated to the Lord. Likewise, those who have separated themselves from the society of the Church through sin, and have fallen into the service of the devil, into the captivity of the Babylonian king by persevering in sins, must be reconciled to the holy Church through repentance by the ministry of the priests. And fittingly, there are twelve priests to whom this duty is assigned, on account of the twelve apostles, through whose teaching the Church was initially founded throughout the world, and who continue to build it up through their successors until the end of the age. To whom applies the statement that Ezra made to those same priests: — Commentary on Ezra and Nehemiah