'Unclean' in the Bible

He stationed the gatekeepers of the house of the Lord, so that no one would enter who was in any way unclean.

So the priests went in to the inner part of the house of the Lord to cleanse it, and every unclean thing which they found in the temple of the Lord they brought out to the court of the house of the Lord. Then the Levites received it to carry out to the Kidron valley.

For there were many in the assembly who had not consecrated themselves; therefore, the Levites were over the slaughter of the Passover lambs for everyone who was unclean, in order to consecrate them to the Lord.