10. How long--Greek, "Until when?" As in the parable the woman (symbol of the Church) cries day and night to the unjust judge for justice against her adversary who is always oppressing her (compare below, Re 12:10); so the elect (not only on earth, but under Christ's covering, and in His presence in Paradise) cry day and night to God, who will assuredly, in His own time, avenge His and their cause, "though He bear long with them." These passages need not be restricted to some particular martyrdoms, but have been, and are receiving, and shall receive partial fulfilments, until their last exhaustive fulfilment before Christ's coming. So as to the other events foretold here. The glory even of those in Paradise will only be complete when Christ's and the Church's foes are cast out, and the earth will become Christ's kingdom at His coming to raise the sleeping saints.
      Lord--Greek, "Master"; implying that He has them and their foes and all His creatures as absolutely at His disposal, as a master has his slaves; hence, in Re 6:11, "fellow servants," or fellow slaves follows.
      holy--Greek, "the Holy one."
      avenge--"exact vengeance for our blood."
      on--Greek, "from them."
      that dwell on the earth--the ungodly, of earth, earthly, as distinguished from the Church, whose home and heart are even now in heavenly places.

JFB.