Ezra 7:6-10

this Ezra went up from Babylon. He was a scribe skilled in the Law (the five books) of Moses, which the LORD God of Israel had given; and the king granted him everything that he asked, for the hand of the LORD his God was on him. Some of the sons of Israel, with some of the priests and Levites, the singers and gatekeepers, and the temple servants also went up [from Babylon] to Jerusalem in the seventh year of King Artaxerxes. Ezra came to Jerusalem in the fifth month of the seventh year of the king. For on the first of the first month he started out from Babylon, and on the first of the fifth month he arrived in Jerusalem, because the good hand of his God was on him. For Ezra had set his heart (resolved) to study and interpret the Law of the LORD, and to practice it and teach His statutes and ordinances in Israel.