Ezra 6:19-22

19 On the fourteenth day of the first month, the returned exiles celebrated the Passover.
20 All of the priests and the Levites had purified themselves; all of them were clean. They slaughtered the Passover animals for all the returned exiles, their fellow priests, and themselves.
21 The Israelites who had returned from exile, together with all those who had joined them by separating themselves from the pollutions of the nations of the land to worship the LORD, the God of Israel, ate the Passover meal.
22 They also joyfully celebrated the Festival of Unleavened Bread for seven days, because the LORD had made them joyful by changing the attitude of the king of Assyria toward them so that he assisted them in the work on the house of God, the God of Israel.
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