Your first father sinned, and your mediators transgressed against me.
27. Thy first father sinned. This passage is almost universally understood to refer to the “first parent” Adam. (Genesis 3:6.) Some prefer to interpret it as relating to Abraham; as if he had said, “You have not alone sinned, but your father Abraham himself sinned, though he was a man of eminent holiness.” Jarchi adopts this view, and paraphrases the clause thus; “‘Thy first father...
This charge (and a high charge it is which is here exhibited against Jacob and Israel, God's professing people) comes in here, 1. To clear God's justice in bringing them into captivity, and to vindicate that. Were they not in covenant with him? Had they not his sanctuary among them? Why then did the Lord deal thus with his land? Deu 29:24.
Commenting on Isaiah 43:22-28
first father--collectively for "most ancient ancestors," as the parallelism ("teachers") proves [MAURER]. Or, thy chief religious ministers or priests [GESENIUS]. Adam, the common father of all nations, can hardly be meant here, as it would have been irrelevant to mention his sin in an address to the Jews specially.