John 17:26

Greek ἡ ἀγάπη ἣν ἠγάπησάς με. "the Love whom [feminine] you have loved me". 

ἣν is a relative pronoun in the feminine, referring to the Agape Love, "she who". Commentators acknowledged the double accusative here. But translations discounted it. The Pulpit Commentary for example, called it an "unusual expression":

"In order that the love wherewith thou hast loved me (notice the unusual expression, ἡ ἀγάπη ην ἠγαπησάς; and cf. Ephesians 2:4)"

(cf. Pulpit Commentary on John 17:26).

The same phrase occurs in Ephesians 2:4. Translators took this pronoun and translated it "wherewith" or "with" which is simply not consistent with the accusative case.