Jeremiah 43:5
But Johanan the son of Kareah, and all the captains of the forces, took all the remnant of Judah, that were returned from all nations, whither they had been driven, to dwell in the land of Judah;
Cross-reference
In Jeremiah 40:11, the Jews in surrounding lands hear about the remnant — explaining why they returned to Judah, as referenced here.
In Jeremiah 40:12, the scattered Jews return to Judah — the exact group now being led away to Egypt here.
In Jeremiah 41:16, Johanan leads the rescued survivors — the same people he now leads to Egypt here.
Jeremiah 40:8 lists the same army officers — Johanan and others — who later lead the remnant to Egypt in 43:5.
Jeremiah 41:10 describes Ishmael capturing the king's daughters and others — the same people Johanan rescues and takes to Egypt in 43:5.
Jeremiah 42:1 shows these same officers asking Jeremiah to pray — but in 43:5 they disobey God and go to Egypt.
Jeremiah 44:1 addresses the Jews in Egypt — the very people who went there in 43:5 — bringing God's judgment.