'Unclean' in the Bible

And he put door-keepers at the doors of the Lord's house, to see that no one who was unclean in any way might come in

And said to them, Give ear to me, O Levites: now make yourselves holy, and make holy the house of the Lord, the God of your fathers, and take away everything unclean from the holy place.

And the priests went into the inner part of the house of the Lord to make it clean, and everything unclean which was to be seen in the Temple of the Lord they took out into the outer square of the Lord's house, and the Levites got it together and took it away to the stream Kidron.

And more than this, all the great men of Judah and the priests and the people made their sin great, turning to all the disgusting ways of the nations; and they made unclean the house of the Lord which he had made holy in Jerusalem.