Mark 6:2

And when the sabbath came, he began to teach in the synagogue. And many that heard him were astonished, and said: Whence has this man these things? and what wisdom is this which is given to him, that even such mighty deeds are done by his hands?

Matthew 4:23

And Jesus went about all Galilee, teaching in their synagogues, and preaching the gospel of the kingdom, and curing every disease, and every kind of sickness among the people.

Matthew 7:28

And it came to pass when Jesus had ended these words, that the multitudes were astonished at his teaching:

Mark 1:21-22

And they went into Capernaum; and immediately, on the sabbath, he entered the synagogue, and taught.

Mark 1:39

And throughout the whole of Galilee he continued to preach in their synagogues, and to cast out demons.

Luke 4:15

And he taught in their synagogues, being glorified by all.

Luke 4:31-32

And he went down to Capernaum, a city of Galilee. And he was teaching them on the sabbath-days.

John 6:42

And they said: Is not this Jesus, the son of Joseph, whose father and mother we know? How, then, does he say, I came down from heaven?

John 7:15

And the Jews were astonished, and said: How has this man a knowledge of letters, having never been taught?

Acts 4:13-14

Now, when they saw the boldness of Peter and John, and perceived that they were unlearned and plain men, they were astonished; and they also recognized them, that they had been with Jesus;

Treasury of Scripture Knowledge

Summary

And when the sabbath day was come, he began to teach in the synagogue: and many hearing him were astonished, saying, From whence hath this man these things? and what wisdom is this which is given unto him, that even such mighty works are wrought by his hands?

He began

Bible References

He began

Mark 1:21
And they went into Capernaum; and immediately, on the sabbath, he entered the synagogue, and taught.
Luke 4:15
And he taught in their synagogues, being glorified by all.

From

John 6:42
And they said: Is not this Jesus, the son of Joseph, whose father and mother we know? How, then, does he say, I came down from heaven?
John 7:15
And the Jews were astonished, and said: How has this man a knowledge of letters, having never been taught?
Acts 4:13
Now, when they saw the boldness of Peter and John, and perceived that they were unlearned and plain men, they were astonished; and they also recognized them, that they had been with Jesus;