Luke 4:31-32

v. 31. and came down to Capernaum, a city of Galilee, and taught them on the Sabbath-days. V. 32. And they were astonished at His doctrine; for His word was with power.

Jesus went down from the hill country to the city of Capernaum, which He made His headquarters during His Galilean ministry. Here He made it a habit to teach in the synagogs on the Sabbath-days, for the preaching of the Gospel of salvation was the first and principal part of His work.

And wherever He taught, the effect of His words was the same: people were astonished almost to stupefaction over His doctrine, which differed so radically from the vapid discourses of the average rabbi, and in authority and power His word went out. There was not only the force of conviction behind it, but the merciful power of God which is in the means of grace and gives them their efficacy.

Note: Luke always adds the geographical references for the sake of his readers, who were unacquainted with the location of the various towns which are mentioned in the Gospel story.