It says "O you third flame whose wings are thorns to stir up vexation" and is the start of the 17th Enochian key. Some DB who goes by AmerikanHustla or Amerikan Terrorist seems to like posting it as a comment at various internet sites.
Enochian is gibberish that some nut-jobs made up a long time ago and is now mainly used by children and overgrown children who think it has magical powers.