'Book of the Law' in the Bible

all the people gathered together as one man to the open place that was before the water-gate; and they spoke to Ezra the scribe to bring the book of the law of Moses, which Jehovah had commanded Israel.

And he read in it before the open place that was before the water-gate from the morning until midday, in presence of the men and the women, and those that could understand. And the ears of all the people were attentive to the book of the law.

Also day by day, from the first day to the last day, he read in the book of the law of God. And they observed the feast seven days; and on the eighth day was a solemn assembly, according to the ordinance.

And they stood up in their place, and read in the book of the law of Jehovah their God a fourth part of the day; and a fourth part they confessed, and worshipped Jehovah their God.