Ezekiel 37:22-24 expands on the one stick: they become one nation with one king — the fulfillment of the joining command.

Ezekiel 37:19 directly explains the joining of the sticks as a symbol of Israel's reunification.

Isaiah 11:13 prophesies the end of hostility between Ephraim and Judah — the very unity Ezekiel's joined sticks represent.

Jeremiah 50:4 describes Israel and Judah coming together to seek the Lord — directly parallel to Ezekiel's reunification.

Hosea 1:11 also prophesies the reunification of Israel and Judah under one head, mirroring the two sticks becoming one.