1 Esdras 7:10–12

10 And the children of Israel that came out of the captivity held the passover the fourteenth day of the first month, when the priests and the Levites were sanctified together, 11 and all they that were of the captivity; for they were sanctified. 12 For the Levites were all sanctified together, and they offered the passover for all them of the captivity, and for their brethren the priests, and for themselves.