A.T. Robertson Commentary John 13:3

"[Jesus], knowing that the Father had given all the things into his hands, and that he came forth from God, and goeth unto God," — John 13:3 (ASV)

Knowing (ειδως). Repeated from verse 1, accenting the full consciousness of Jesus.

Had given (εδωκεν). So Aleph B L W, aorist active instead of δεδωκεν (perfect active) of διδωμ. Cf. 3:31 for a similar statement with εν instead of εις. See Mt 11:27 (Luke 10:22) and 28:18 for like claim by Jesus to complete power.

And that he came forth from God, and goeth unto God (κα οτ απο θεου εξηλθεν κα προς τον θεον υπαγε). See plain statement by Jesus on this point in 16:28. The use of προς τον θεον recalls the same words in 1:1. Jesus is fully conscious of his deity and Messianic dignity when he performs this humble act.