'It is Written' in the Bible

and that they should proclaim and give voice in all of their cities in Jerusalem, saying, "Go out to the hill and bring olive tree branches, olive oil wood branches, myrtle shrub branches, palm tree branches, and other leafy tree branches to make booths, as it is written."

And we have cast lots for the contributions of the wood offering of the priests, the Levites, and the people to bring [it] to the house of our God, by our fathers' houses, at designated times, year by year, to burn on the altar of Yahweh our God--as it is written in the law.

And the firstborn of our sons and beasts--as it is written in the law--and the firstborn of our cattle and sheep, to bring to the house of our God [and] to the priests serving in the house of our God.