Ezra 2:20 lists the descendants of Adin who returned from exile in Babylon to Jerusalem. This verse highlights the importance of genealogy and the restoration of the Jewish community after the exile. It emphasizes the faithfulness of God in preserving the lineage of His people and fulfilling His promises. The mention of Adin serves as a reminder of the continuity of God's covenant with His chosen people despite the challenges they faced. Overall, Ezra 2:20 contributes to the historical account of the post-exilic period, showcasing God's faithfulness and the perseverance of the Jewish remnant.