Psalms 21:10

Their fruit shalt thou destroy from the earth, and their seed from among the children of men.

Their fruit and their seed are to be destroyed from the earth and from among the children of men, so that the wicked are rooted out and only the righteous dwell in the earth. That removal is necessary because the earth was not made for wickedness. Transgressors will not accord with what was intended to give them happiness, so they must be removed. Since there is no place in the universe for them to remain, they go out of the world by the lake of fire prepared for the devil and his angels, when the righteous are called to take possession of the kingdom. Their punishment will be inflicted by means of fire, and the place of their punishment is described as a fiery oven.