Jeremiah 29:3
By the hand of Elasah the son of Shaphan, and Gemariah the son of Hilkiah, (whom Zedekiah king of Judah sent unto Babylon to Nebuchadnezzar king of Babylon) saying,
Cross-reference
Jeremiah 29:16 continues the same letter, addressing those left behind in contrast to the exiles.
Jeremiah 36:25 shows Gemariah pleading for the scroll — the same Gemariah who carries this letter to Babylon.
Jeremiah 36:10 mentions Gemariah son of Shaphan, another son of the same scribal family involved in Jeremiah's ministry.
Jeremiah 26:24 mentions Ahikam son of Shaphan — Shaphan is also father of Elasah, one of the letter carriers.
Jeremiah 39:14 mentions Gedaliah son of Ahikam (son of Shaphan) — same family as Elasah, a carrier of this letter.
2 Kings 22:8 introduces Shaphan and Hilkiah — the same families as the carriers of this letter (Elasah and Gemariah).
2 Kings 22:12 lists Ahikam son of Shaphan and Hilkiah — the same families as the letter carriers.
2 Chronicles 34:8 has Shaphan sent to repair the temple; here his son Elasah is sent to deliver a letter — both are royal commissions.
Ezekiel 8:11 mentions Jaazaniah son of Shaphan — Shaphan also fathered Elasah who carries this letter.