This entire verse is a Western non-interpolation. This incident is given in complete form in John 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 (παρακυψας). First aorist active participle of παρακυπτω, to stoop besides and peer into. Old verb used also in John 20:5; John 20:11; James 1:25; 1. Peter 1:12.

By themselves (μονα). Without the body.

To his home (προς αυτον). Literally, "to himself."