Ezra 6:19-22 - The Celebration Of Passover
19 And the sons of the exile will do the passover in the fourteenth to the first month. 20 For the priests and Levites were purified as one, all of them being purified; and they will slaughter the pass-over for all the sons of the exile, and for their brethren the priests, and for themselves. 21 And the sons of Israel will eat; those turning back from exile and every one being separated from the uncleanness of the nations of the earth to them, to seek for Jehovah the God of Israel; 22 And they will do the festival of the unleavened seven days in gladness: for Jehovah gladdened them, and turned the heart of the king of Assur to them, to strengthen their hands in the work of the house of God, the God of Israel