Isaiah 56:10

His watchmen, the men on the lookout in the watch-tower of city or fold, in this case the prophets of Israel, are blind, the false teachers deliberately blinding themselves against the needs of the people; they are all ignorant, lacking in true spiritual understanding, they are all dumb dogs, they cannot bark, like shepherd dogs too lazy or indifferent to raise the alarm at the coming of the wolves; sleeping, lying down, idle dreamers and sluggards, loving to slumber, delighting in self-indulgence. Instead of feeding the flock of the Lord with the Word of God entrusted to them, the false prophets of all times have only their own comfort, the enrichment of their own lazy selves, in mind. Physical laziness usually goes together with intellectual and spiritual relaxation.