18. Also day by day … he read in the book of the law of God—This was more than was enjoined (De 31:10-12), and arose from the exuberant zeal of the time.
on the eighth day was a solemn assembly—This was the last and great day of the feast (see on Nu 29:35). In later times, other ceremonies which increased the rejoicing were added (Joh 7:37).