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John Gill
Then the disciples,.... Peter and John, after they had seen and examined things, and satisfied themselves as much as they could: went away again unto their own home; or "to themselves", as in the original text, and so the Vulgate Latin reads it; not that the meaning is, that they had been out of their minds, and proper exercise of them, and now came to themselves; but they returned to their own...
Matthew Henry
This evangelist, though he began not his gospel as the rest did, yet concludes it as they did, with the history of Christ' resurrection; not of the thing itself, for none of them describe how he rose, but of the proofs and evidences of it, which demonstrated that he was risen. The proofs of Christ's resurrection, which we have in this chapter, are I. Such as occurred immediately at the sepulchre....
Charles H. Spurgeon
Then the disciples went away again unto their own home. Having ascertained that the body of Jesus was not there, and John having come to the conclusion that the Lord had indeed risen from the dead, he and Peter went away home prayerfully to wait and see what next would happen.