'Slumber' in the Bible

None shall be weary nor stumble among them; none shall slumber nor sleep; neither shall the girdle of their loins be loosed, nor the latchet of their shoes be broken:

First, to Zion: "There is slumber." And to Jerusalem: "I'll send a messenger with good news."

His watchmen are blind: they are all ignorant, they are all dumb dogs, they cannot bark; sleeping, lying down, loving to slumber.