Albert Barnes Commentary Mark 11:15

"And they come to Jerusalem: and he entered into the temple, and began to cast out them that sold and them that bought in the temple, and overthrew the tables of the money-changers, and the seats of them that sold the doves;" — Mark 11:15 (ASV)

See Barnes on Matthew 21:12, also Matthew 21:13-15.

Moneychangers: Deuteronomy 14:25–26.