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. Who redeemed Abraham - As God redeemed Abraham from among idolaters and workers of iniquity, so will he redeem those who hear the words of the Book, and are humbled before him, Isaiah 29:18, Isaiah 29:19.
Concerning the house of Jacob "The God of the house of Jacob" - I read אל El as a noun, not a preposition: the parallel line favors this sense; and there is no address to the house of Jacob to justify the other.
Neither shall his face now wax pale "His face shall no more be covered with confusion" - "יחורו yechoro, Chald. ut ὁ μεταβαλει, Theod. εντραπησεται, Syr. נחפרו necaphro, videtur legendum יחפרו yechepheru: hic enim solum legitur verbum, חור chavar, nec in linguis affinibus habet pudoris significationem." - Secker. "Here alone is the verb חור charar read; nor has it in the cognate languages the signification of shame."