1 John 3:24

Καὶ ὁ τηρῶν τὰς ἐντολὰς αὐτοῦ ἐν αὐτῷ μένει, καὶ αὐτὸς ἐν αὐτῷ. Καὶ ἐν τούτῳ γινώσκομεν ὅτι μένει ἐν ἡμῖν, ἐκ τοῦ πνεύματος οὗ ἡμῖν ἔδωκεν.

RBT Translation:

αὐτὸς ἐν αὐτῷ - himself in himself

And the one who is watching over the Commandments of himself, within himself he is remaining, and himself within himself, and within this one we are recognizing that he is remaining within ourselves from out of the Spirit which he has given ourselves.

Julia Smith Literal 1876 Translation:
None

LITV Translation:
And the one keeping His commandments abides in Him, and He in him. And by this we know that He abides in us, by the Spirit which He gave to us.