Sifrei Devarim
"and there is no one who is restrained (from coming to harm) or strengthened, as in (II Kings 14:26) "For the L-rd saw the affliction of Israel … with none restrained and none strengthened, and no help for Israel," and (Isaiah 59:16) "And He saw that there was no man, and He was astonished that there was no intercessor."