20. Desire--pant for. Job had wished for death (Job 3:3-9, &c.).
      night-- (Joh 9:4).
      when--rather, "whereby."
      cut off--literally, "ascend," as the corn cut and lifted upon the wagon or stack (Job 36:26); so "cut off," "disappear."
      in their place--literally, "under themselves"; so, without moving from their place, on the spot, suddenly (Job 40:12) [MAURER]. UMBREIT'S translation: "To ascend (which is really, as thou wilt find to thy cost, to descend) to the people below" (literally, "under themselves"), answers better to the parallelism and the Hebrew. Thou pantest for death as desirable, but it is a "night" or region of darkness; thy fancied ascent (amelioration) will prove a descent (deterioration) (Job 10:22); therefore desire it not.

JFB.