Charles H. Spurgeon on Psalms 63:9

As David earnestly sought for God, so there were men of another order who as eagerly sought after his blood; of these he speaks: But those that seek my soul, to destroy it. At his life they aimed, at his honour, his best welfare; and this they would not merely injure but utterly ruin. The devil is a destroyer, and all his seed are greedy to do the same mischief; and as he has ruined himself by his crafty devices, so also shall they. Destroyers shall be destroyed. Those who hunt souls shall be themselves the victims. Shall go into the lower parts of the earth. Into the pits which they digged for others they shall fall themselves. The slayers shall be slain, and the grave shall cover them. The hell which they in their curse invoked for others shall shut its mouth upon them. Every blow aimed against the godly will recoil on the persecutor; he who smites a believer drives a nail in his own coffin.