This is again the second sign that Jesus did, having come out of Judea into Galilee.
This pericope (John 4:46-54) constitutes the closing incident in John’s account of Jesus’ early public ministry (chs. 2-4). It shows Him returning to Cana, Nathanael’s hometown (John 21:2), where He performed another significant miracle. John evidently included it to show that Jesus’ demonstration of His authority resulted in some Jews believing on Him.