This entire verse is a Western non-interpolation. This incident is given in complete form in Joh 18:2-10 and most of the words in this verse are there also. It is of a piece with many items in this chapter about which it is not easy to reach a final conclusion.
Stooping and looking in (parakupsas). First aorist active participle of parakuptō, to stoop besides and peer into. Old verb used also in Joh 20:5, Joh 20:11; Jam 1:25; 1Pe 1:12.
By themselves (mona). Without the body.
To his home (pros hauton). Literally, “to himself.”