Ezra 6:21-22

The sons of Israel who returned from exile and all those who had separated themselves from the impurity of the nations of the land to join them, to seek the LORD God of Israel, ate the Passover. And they observed the Feast of Unleavened Bread seven days with joy, for the LORD had caused them to rejoice, and had turned the heart of the king of Assyria toward them to encourage them in the work of the house of God, the God of Israel.