John 1:39

‘They came therefore and saw where he dwelt, and they remained with him that day. It was about the tenth hour.’

So in response to Jesus’ invitation they go to where He is staying and spend the day with Him, presumably being taught by Him. But behind it may well lie the implication that they also became enlightened by Him as to His eternal dwelling place (‘they saw where He dwelt’). They became aware that He was truly from God. The reference to the tenth hour suggests someone who was there. He remembers the time of day because he was involved.