16. blackish—literally, "Go as a mourner in black clothing" (Ps 34:14). A vivid and poetic image to picture the stream turbid and black with melted ice and snow, descending from the mountains into the valley. In the [second] clause, the snow dissolved is, in the poet's view, "hid" in the flood [UMBREIT].

     17. wax warm—rather, "At the time when." ("But they soon wax") [UMBREIT]. "they become narrower (flow in a narrower bed), they are silent (cease to flow noisily); in the heat (of the sun) they are consumed or vanish out of their place. First the stream flows more narrowly—then it becomes silent and still; at length every trace of water disappears by evaporation under the hot sun" [UMBREIT].

     18. turned aside—rather, "caravans" (Hebrew, "travellers") turn aside from their way, by circuitous routes, to obtain water. They had seen the brook in spring full of water: and now in the summer heat, on their weary journey, they turn off their road by a devious route to reach the living waters, which they remembered with such pleasure. But, when "they go," it is "into a desert" [NOYES and UMBREIT]. Not as English Version, "They go to nothing," which would be a tame repetition of the drying up of the waters in Job 6:17; instead of waters, they find an "empty wilderness"; and, not having strength to regain their road, bitterly disappointed, they "perish." The terse brevity is most expressive.