Charles H. Spurgeon on Psalms 59:13

Consume them, emphatically, consume them in wrath, that they may not be; which at first sight seems contrary to his first desire, Slay them not; but it is not so, for he speaks not of their life, as if he would have them so consumed, that they should not remain alive; but he desires only a consumption of their power, royalty, command, etc. And so these words are a farther explication of his second desire, Bring them down. He would have them so brought down and consumed in their strength, dignity, command, wealth, riches, that made them proud, that they never be able any more to oppose God, hurt his people, trample upon religion and his church; he would have them live. William Nicholson.