Ezra 6:21-22

21So those of Bnei-Yisrael who had returned from the exile ate it, together with all who had separated themselves from the impurity of the nations of the land to seek Adonai the God of Israel.

22They celebrated the Feast of Matzot with joy for seven days, because Adonai had given them joy and had changed the heart of the king of Assyria toward them so as to strengthen their hands in the work on the House of God, the God of Israel.