'Law of God' in the Bible

They read in the book, in the law of God, distinctly; and they gave the sense, so that they understood the reading.

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

The rest of the people, the priests, the Levites, the gatekeepers, the singers, the Nethinim, and all those who had separated themselves from the peoples of the lands to the law of God, their wives, their sons, and their daughters, everyone who had knowledge, and understanding?