'Slave' in the Bible

Thus says the Lord,“For three transgressions of Gaza [in Philistia] and for four (multiplied delinquencies)I will not reverse its punishment or revoke My word concerning it,Because [as slave traders] they took captive the entire [Jewish] population [of defenseless Judean border villages, of which none was spared]And deported them to Edom [for the slave trade].