'Sacrificed' in the Bible

and they came to Zerubbabel and to the chief fathers, and said to them, We would build with you; for we seek your God, as ye; and we have sacrificed to him since the days of Esar-haddon king of Assyria, who brought us up hither.

The priests and the Levites had purified themselves, every last one, and they all were ceremonially pure. They sacrificed the Passover lamb for all the exiles, for their colleagues the priests, and for themselves.