'Den of Thieves' in the Bible

What? Think you this house that beareth my name, is a den of thieves? And these things are not done privily, but before mine eyes, sayeth the LORD.

And said unto them, It is written, My house shall be called the house of prayer; but ye have made it a den of thieves.

And he taught, saying unto them, Is it not written, My house shall be called of all nations the house of prayer? but ye have made it a den of thieves.

Saying unto them, It is written, My house is the house of prayer: but ye have made it a den of thieves.