What did Jesus overturn in the temple courts?

Answer: The money changers' tables

Jesus drove out all who were buying and selling and overturned the tables of the money changers and the seats of those selling doves.

“Then Jesus entered the temple courts and drove out all who were buying and selling there. He overturned the tables of the money changers and the seats of those selling doves.”— Matthew 21:12 (BSB)