the whole seed of Ephraim. Put by Figure of speech Synecdoche (of the Part), for the ten tribes which were already in captivity. The trouble recorded in Jeremiah 27 proves that this prediction was spoken.
Related Commentaries of Jeremiah 7:15
Jeremiah 7:15
15 And I will cast you out of my sight, as I have cast out all your brethren, even the whole seed of Ephraim.