Ezra 7:8-10

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.