Ezra 2:21 lists the descendants of Bethlehem who returned from exile in Babylon to Jerusalem. This verse highlights the faithfulness of God in preserving the lineage of His people and fulfilling His promise to restore them to their land. It also underscores the importance of genealogy in maintaining the identity and heritage of the Israelites. The return of the exiles symbolizes God's faithfulness in bringing His people back to their homeland after a period of exile and separation.