15 As the delusion was extending, Peter and Paul, a noble pair, chief rulers of the Church, arrived and set the error right; and when the supposed god Simon wished to show himself off, they straightway showed him as a corpse. For Simon promised to rise aloft to heaven, and came riding in a dæmon.' chariot on the air; but the servants of God fell on their knees, and having shown that agreement of which Jesus spoke, that If two of you shall agree concerning anything that they shall ask, it shall be done unto them, they launched the weapon of their concord in prayer against Magus, and struck him down to the earth. And marvellous though it was, yet no marvel. For Peter was there, who carries the keys of heaven: and nothing wonderful, for Paul was there, who was caught up to the third heaven, and into Paradise, and heard unspeakable words, which it is not lawful far a man to utter. These brought the supposed God down from the sky to earth, thence to be taken down to the regions below the earth. In this man first the serpent of wickedness appeared; but when one head had been cut off, the root of wickedness was found again with many heads.
Source: Catechetical Lectures (New Advent)