In Mark's Gospel, chapter 11, it says that when Jesus arrived in Jerusalem, he went to the Jewish Temple. He became angry at what he saw. There were people selling things there, and money lenders who were cheating poor people. Jesus chased away all the people who were selling things. He said the chief priests and scribes had turned the temple into a den of thieves because they were making money from the poor and taking away homes from poor women who had no other way to pay for the temple worship.