The traditional belief is that the Apostle John went to Ephesus with Mary, the mother of Jesus.
This belief is rooted in the following:
* Jesus' words on the cross: In John 19:26-27, Jesus entrusted Mary to the care of the "beloved disciple" (traditionally identified as John).
* Early Church tradition: Several early Church Fathers, including Irenaeus, Polycrates, and Eusebius, wrote about John's presence in Ephesus and his leadership of the churches in Asia Minor.
* Absence of John from later accounts in Jerusalem: After the events recorded in the early chapters of Acts, John is not mentioned in connection with Jerusalem, which has been interpreted as suggesting he left the city.
* Mary's later life: Some traditions claim Mary spent her later years in or near Ephesus. However, this is less firmly supported by early historical sources.
It is important to note that there is no explicit biblical statement that Mary went to Ephesus.
Therefore, while the traditional belief is that the Apostle John went to Ephesus with Mary, the mother of Jesus, it is not explicitly stated in the Bible.