'It is Written' in the Bible

And Jeshua son of Jehozadak and his brothers the priests stood up, and Zerubbabel the son of Shealtiel and his brothers built the altar of the God of Israel, in order to offer burnt offerings on it, as it is written in the law of Moses, the man of God.

And they kept the feast of booths, as it is written, and [offered] burnt offerings day by day in number according to the ordinance {as described for each day}.

Then they set the priests in their divisions and the Levites in their sections for the work of God in Jerusalem, as it is written in the book of Moses.