Midrasch zu Jeschijahu 54:7

THE RESURRECTION OF THE DEAD
"SEE now that I, even I, am he, and there is no God with me" (Deut. 32:89). Only the Holy One, blessed be He, said: "I am" in this world, and "I am" in the world to come; I am the one who redeemed Israel from Egypt, and I am the one who, in the future, will redeem them at the end of the fourth kingdom; therefore it is said, "I, even I, am he, and there is no God with me" (ibid.). Every nation who say that there is a second God, I will slay them as with a second death || which has no resurrection; and every nation who say that there is no second God, I will quicken them for the eternal life. And in the future I will slay those (first mentioned) and quicken these, therefore it is said, "I kill, and I make alive" (ibid.). I have wounded Jerusalem and her people on the day of My anger, and in great mercy I will heal them, therefore it is said, "I have wounded, and I will heal" (ibid.). Neither any angel nor any seraph will deliver the wicked from the judgment of Gehinnom, as it is said, "And there is none that can deliver out of my hand" (ibid.).