'Border' 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].

Thus says the Lord,“For three transgressions of the children of Ammon and for four (multiplied delinquencies)I will not reverse its punishment or revoke My word concerning it,Because the Ammonites have ripped open the pregnant women of Gilead,That they might enlarge their border.