'It is Written' in the Bible

Then Jeshua the son of Jozadak and his brothers the priests, and Zerubbabel the son of Shealtiel and his brothers arose, and they built the altar of the God of Israel, to offer burnt offerings on it, as it is written in the Law of Moses, the man of God.

They celebrated the Feast of Booths, as it is written, and offered the fixed number of daily burnt offerings, in accordance with the ordinances, as each day required;

Then they appointed the priests to their divisions and the Levites in their orders for the service of God at Jerusalem, as it is written in the book of Moses.