Ezra 3:1-4

In the seventh month, after the Israelites were settled in their hometowns, they met together in Jerusalem. Then Jeshua son of Jozadak and his fellow priests joined Zerubbabel son of Shealtiel and began to build the altar of the God of Israel where they could offer burnt offerings, just as it is written in the Teachings of Moses, the man of God. Even though they were afraid of the people living around them, they built the altar where it had been before. And they offered burnt offerings on it to the LORD morning and evening. Then, to obey what was written, they celebrated the Feast of Shelters. They offered the right number of sacrifices for each day of the festival.