Commentators overwhelmingly focus on identifying the specific geographical locations that define the southern border of the restored land. They identify 'Tamar' as a place near the Dead Sea, 'Meriboth-kadesh' with the site of Israel's strife from the book of Numbers, and the 'brook' as the Wadi el-Arish, which flows to the Mediterranean Sea. This specificity highlights the tangible and real nature of God's promised restoration.