14 “But themselves in vain have sought my soul. They shall go unto the lower places of the earth”. Earth they were unwilling to lose, when they crucified Christ: into the lower places of the earth they have gone. What are the lower places of the earth? Earthly lusts. Better it is to walk upon earth, than by lust to go under earth. For every one that in prejudice of his salvation desires earthly things, is under the earth: because earth he has put before him, earth upon himself he has put, and himself beneath he has laid.
They therefore fearing to lose earth, said what of the Lord Jesus Christ, when they saw great multitudes go after Him, forasmuch as He was doing wonderful things? “If we shall have let Him go alive, there will come the Romans, and will take away from us both place and nation.” They feared to lose earth, and they went under the earth: there befell them even what they feared. For they willed to kill Christ, that they might not lose earth; and earth they therefore lost, because Christ they slew.
For when Christ had been slain, because the Lord Himself had said to them, “The kingdom shall be taken from you, and shall be given up to a nation doing righteousness:” there followed them great calamities of persecutions: there conquered them Roman emperors, and kings of the nations: they were shut out from that very place where they crucified Christ, and now that place is full of Christian praisers: it has no Jew, it has been cleared of the enemies of Christ, it has been fulfilled with the praisers of Christ. Behold, they have lost at the hands of the Romans the place, because Christ they slew, who to this end slew, that they might not lose the place at the hands of the Romans. Therefore, “They shall enter into the lower places of the earth.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)