" For Mine own sake, for Mine own sake, will I do it (Isa. xlviii. 11). Why this repetition? The Holy One — blessed be He! — said, "As I redeemed you when you were in Egypt for My name's sake" — (Ps. cvi. 8), " He saved them for His name's sake," — " so in like manner will I do it from Edom for My own name's sake. Again, as I redeemed you in this world, so likewise will I redeem you in the world to come;" for thus He saith (Eccles. i. 9), " The thing that hath been is that which shall be" (Isa. li. 11); " The redeemed of the Lord shall return; " not the redeemed of Elijah, nor the redeemed of the Messiah, but " the redeemed of the Lord."
Not the Redeemed of Elijah — Only the Redeemed of the Lord
Midrash Shocher Tov on Psalm 107 (Harris, Hebraic Literature, 1901)