Isaiah 61:1-3 prophesies an anointed preacher of good news — the OT foundation Jesus fulfills in his mission to preach from town to town.

In Luke 4:18-21, Jesus reads Isaiah and announces fulfillment: his mission to preach good news — the very purpose Mark 1:38 states.

In Luke 4:43, Jesus says he must preach the kingdom to other towns, echoing Mark 1:38's purpose statement almost verbatim.

In Matthew 11:1, Jesus goes to teach and preach in other cities — the direct fulfillment of the plan stated in Mark 1:38.

In John 17:4, Jesus says he has accomplished the work the Father gave him — the same mission Mark 1:38 begins, now completed.

In John 17:8, Jesus declares he gave the disciples the words the Father gave him — the content of the preaching Mark 1:38 describes.

In Luke 2:49, the boy Jesus declares he must be about his Father's business — the same divine necessity and sense of purpose as his preaching mission.

In John 9:4, Jesus urges working the works of the one who sent him while day lasts — the same urgency and mission focus seen in Mark 1:38.

In Acts 18:20, Paul similarly declines an extended stay to continue his preaching mission, mirroring Jesus' priority in leaving Capernaum.

In Acts 10:38, Peter summarizes Jesus' ministry as doing good and healing — a broader description than the preaching focus of Mark 1:38.