Thomas Aquinas — on Ps 9:6 (Exposition on the Psalms of David)

“"Their memory has perished." Here is set forth the manner in which he perished; this is explained in two ways. "It has perished," that is, their memory and their noise perish together. The wicked make noise by shaking kingdoms and destroying cities: Ezek. 31: "All are delivered unto death, to the lowest parts of the earth, in the midst of the children of men, to those who go down into the pit." Or, the wicked -- when some evil man is destroyed, it is not without great tumult, because he must suffer some tribulation, as is evident in Mt. 9, when the Devil went out crying and greatly tearing. Jerome's text has, "Their memory has perished with the wicked," because they did nothing good by which their memory might remain in good: Eccl. 6: "He came in vain and goes into darkness, and his name shall be covered with oblivion."”