Albert Barnes Commentary Ezra 3:7

"They gave money also unto the masons, and to the carpenters; and food, and drink, and oil, unto them of Sidon, and to them of Tyre, to bring cedar-trees from Lebanon to the sea, unto Joppa, according to the grant that they had of Cyrus king of Persia." — Ezra 3:7 (ASV)

According to the grant - that is, in accordance with the permission granted them by Cyrus to rebuild their temple (Ezra 1:1–4).