Therefore thus saith the LORD, who redeemed Abraham, concerning the house of Jacob, Jacob shall not now be ashamed, neither shall his face now wax pale.
Thus saith the Lord ... Join "saith ... concerning the house of Jacob."
Redeemed - out of Ur, a land of idolaters (Joshua 24:3). Not now - after the moral revolution described, Isaiah 29:17, the children of Jacob shall no longer give cause to their forefathers to blush for them.
Neither ... wax pale - with shame and disappointment at the wicked degeneracy of his posterity, and fear as to their punishment.