Charles Ellicott Commentary Mark 12:28

"And one of the scribes came, and heard them questioning together, and knowing that he had answered them well, asked him, What commandment is the first of all?" — Mark 12:28 (ASV)

And one of the scribes came.—See Notes on Matthew 22:34-40. St. Mark’s description is somewhat less precise than St. Matthew’s one of them (i.e., the Pharisees), a lawyer. The form of the question differs by the substitution of “first of all” for “great” commandment.