TSK · Nehemiah 12:30

So Jacob told his household and all who were with him,“Get rid of the foreign gods you have among you. Purify yourselves and change your clothes.

He said to the people,“Be ready for the third day. Do not approach your wives for marital relations.”

The priests and Levites consecrated themselves so they could bring up the ark of the LORD God of Israel.

But there were not enough priests to skin all the animals, so their brothers, the Levites, helped them until the work was finished and the priests could consecrate themselves.(The Levites had been more conscientious about consecrating themselves than the priests.)

Then I directed the Levites to purify themselves and come and guard the gates in order to keep the Sabbath day holy.For this please remember me, O my God, and have pity on me in keeping with your great love.

When the days of their feasting were finished, Job would send for them and sanctify them; he would get up early in the morning and offer burnt offerings according to the number of them all. For Job thought,“Perhaps my children have sinned and cursed God in their hearts.” This was Job’s customary practice.

and for this reason he is obligated to make sin offerings for himself as well as for the people.