2 John 1:2

διὰ τὴν ἀλήθειαν τὴν μένουσαν ἐν ἡμῖν, καὶ μεθ᾽ ἡμῶν ἔσται εἰς τὸν αἰῶνα·

RBT Translation:

Across to the Truth, the one who is abiding within ourselves, and in company with ourselves, she will be into the Eternal (aiōn) One.

Julia Smith Literal 1876 Translation:
For the truth remaining in us, and shall be with us forever.

LITV Translation:
because of the truth remaining among us, and will be with us forever.