NEH 5:8

8 and I said to their [leaders], “Some of our Jewish relatives have been forced to sell themselves to become slaves of people who have come from other countries. As much as we have been able to, we have been buying them back [out of slavery]. But now you are forcing your own relatives to sell themselves to you, their fellow Jews, as slaves!” [When I said that to them,] they were silent. There was nothing that they could say [because they knew that what I said was true].