Ezra 6:21-22

21Then the children of Israel who had returned from the captivity ate together with all who had separated themselves from the filth of the nations of the land in order to seek the Lord God of Israel.

22And they kept the Feast of Unleavened Bread seven days with joy; for the Lord made them joyful, and turned the heart of the king of Assyria toward them, to strengthen their hands in the work of the house of God, the God of Israel.