Book of Nehemiah
In chapter 8, the Book of Nehemiah abruptly switches back to Ezra, apparently with no change in the chronology, but the year is not specified. The Book of Nehemiah says that Ezra gathered the Jews together to read and enforce the law (his original commission from Darius but put into effect only now, 14 years after his arrival). Ezra argued to the people that failure to keep the law had caused the Exile. The Jews then agreed to separate themselves from the "peoples of the land" (once again, intermarriage was banned), keep Sabbath and generally observe the Law. ()