Matthew 21:13
He said to them: it is written, my house shall be called a house of prayer, but you have made it a den of robbers. The dual citation: Isaiah 56:7 (my house shall be called a house of prayer for all peoples) and Jeremiah 7:11 (has this house, which is called by my name, become a den of robbers?). The house of prayer for all peoples is the temple's purpose; the den of robbers is what the commercial system has reduced it to. Jeremiah's den of robbers was in the context of his temple sermon condemning the people who trusted in the temple while violating the covenant — the same dynamic Jesus addresses.