There's nothing in the Scriptures that speak of purgatory or Limbo either. Also, in Luke 16:19-31 it states: "There was a certain rich man, which was clothed in purple and fine linen, and fared sumptuously every day: And desiring to be fed with the crumbs which fell from the rich man's table: moreover the dogs came and licked his sores. And it came to pass, that the beggar died, and was carried by the angels into Abraham's bosom: the rich man also died, and was buried; And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom. And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame. But Abraham said, Son, remember that thou in thy lifetime receivedst thy good things, and likewise Lazarus evil things: but now he is comforted, and thou art tormented. And beside all this, between us and you there is a great gulf fixed: so that they which would pass from hence to you cannot; neither can they pass to us, that would come from thence. Then he said, I pray thee therefore, father, that thou wouldest send him to my father's house: For I have five brethren; that he may testify For I have five brethren; that he may testify unto them, lest they also come into this place of torment.
Abraham saith unto him, They have Moses and the prophets; let them hear them. And he said, Nay, father Abraham: but if one went unto them from the dead, they will repent.And he said unto him, If they hear not Moses and the prophets, neither will they be persuaded, though one rose from the dead.
King James Version (KJV)
I believe this "holding place" for the unsaved is where they go after leaving this world. They stay there until they are brought before God the Father at the Great White Throne Judgment. Where they will be judged according to their works and subsequently cast into the Lake of Fire for eternity. The Lake of Fire is where Satan and his fallen angels will be cast as well. I recommend you read the last few chapters of Revelation to see what goes on at that judgement. Notice, in that account there's no mention of purgatory or Limbo? There was Abrahams Bosom where the saved were and Hades where the unsaved were being kept until judgement day. When the True Believer leaves this world today, he/she directly goes to be with the Lord in Heaven and the unsaved go to Hades.