Matthew 8:19 - Ellicott's Commentary On The Whole Bible

A certain scribe came. — The facts that follow are placed by St. Luke, as we have seen, in quite another stage of our Lord’s ministry. The fact that it was a scribe that came is striking, as showing that the impression made by our Lord’s teaching was not confined to the “common people” that “heard him gladly.” As Nicodemus had already come confessing that He was a “Teacher come from God,” so in Galilee there was one whom the Sermon on the Mount, or some like discourse, had led to volunteer at least the show of discipleship.