John Wesley on Matthew 21:12

He cast out all that sold and bought - Doves and oxen for sacrifice. He had cast them out three years before, John 2:14; bidding them not make that house a house of merchandise. Upon the repetition of the offence, he used sharper words. In the temple - That is, in the outer court of it, where the Gentiles used to worship. The money changers - The exchangers of foreign money into current coin, which those who came from distant parts might want to offer for the service of the temple. Mark 11:11,15; Luke 19:45.