Bede the Venerable — as excerpted in the Catena Aurea on Luke 3:15-17

“For by the floor is represented the present Church, in which many are called but few are chosen. The purging of which floor is even now carried on individually, when every perverse offender is either cast out of the Church for his open sins, (by the hands of the Priesthood,) or for his secret sins is after death condemned by Divine judgment. And at the end of the world it will be accomplished universally, when the Son of Man shall send His angels, and they shall gather out of His kingdom every thing that has offended.”