About eighty years have gone by between chapters 6 and 7. Here to the end of the book, Ezra appears for the first time and personally tells of leading the second group out of Babylon.
V.1-5 Ezra was a descendant of Aaron, and therefore was a priest by birth.
V.6 Ezra also carefully read the law of Moses. This is the only way he could be of help to others.
V.10 Notice three things in this verse. Good for us too.