18. my blood--that is, my undeserved suffering. He compares himself to one murdered, whose blood the earth refuses to drink up until he is avenged (Ge 4:10, 11; Eze 24:1, 8; Isa 26:21). The Arabs say that the dew of heaven will not descend on a spot watered with innocent blood (compare 2Sa 1:21).
      no place--no resting-place. "May my cry never stop!" May it go abroad! "Earth" in this verse in antithesis to "heaven" (Job 16:19). May my innocence be as well-known to man as it is even now to God!

JFB.