Yehezkiel 37:21-22

37:21 Then tell them, ‘This is what the sovereign Lord says: Look, I am about to take the Israelites from among the nations where they have gone. I will gather them from round about and bring them to their land. 37:22 I will make them one nation in the land, on the mountains of Israel, and one king will rule over them all. They will never again be two nations and never again be divided into two kingdoms. ¹ 

[37:22]  ¹ sn Jeremiah also attested to the reuniting of the northern and southern kingdoms (Jer 3:12, 14; 31:2-6).