Ezra 6:20
for the priests and Levites had purified themselves, so that they were all clean as one man, and killed Passover for all the children of the captivity, and for their brethren the priests, and for themselves.
2 Chronicles 35:11
And they slew Passover: and the priests sprinkled the blood, receiving it of the Levites, and the Levites stripped the beasts.
2 Chronicles 29:34
But the priests were too few, and were not able to slay all the burnt offerings. Wherefore their brethren the Levites helped them till the work was ended, and until the priests were sanctified. For the Levites were purer-hearted to sanctify themselves then the priests.
Exodus 12:21
And Moses called for the elders of Israel and said unto them, "Choose out, and take to every household a sheep and kill, Passover.
2 Chronicles 30:15-17
And they slew Passover the fourteenth day of the second month. And the priests and Levites sanctified themselves for shame, and brought in the burnt offerings into the house of the LORD.
Hebrews 7:27
Which needeth not daily - as yonder high priests - to offer up sacrifice, first for his own sins, and then for the people's sins. For that did he at once for all, when he offered up himself: