Sometimes denotes intense darkness and gloom, Ps 23:4, and sometimes a cool retreat, Isa 33:2, or perfect protection, Ps 17:8Isa 49:2Da 4:12.
The long shadows cast by the declining sun are alluded to in Job 7:2Jer 6:4. The swift, never ceasing motion of a shadow is an emblem of human life, 1Ch 29:15Ps 102:11.