Jesus is rebuking the Jewish leaders for their misuse of the temple. This can be written as a statement. Alternate translation: "It is written in the scriptures that God said, 'I want my house to be called a house where people from all nations may pray.'" (See: [[rc://en/ta/man/translate/figs-rquestion]])
Jesus compares the people to robbers and the temple to a robbers' den. Alternate translation: "But you are like robbers who have made my house into a robbers' den" (See: [[rc://en/ta/man/translate/figs-metaphor]])