Albert Barnes Commentary Jeremiah 7:15

"And I will cast you out of my sight, as I have cast out all your brethren, even the whole seed of Ephraim." — Jeremiah 7:15 (ASV)

The whole seed of Ephraim - i.e., the whole of the nine northern tribes. Their casting out was a plain proof that the possession of the symbols of God’s presence does not secure a Church or nation from rejection, if unworthy of its privileges.