'Impurity' in the Bible

The sons of Israel who returned from exile and all those who had separated themselves from the impurity of the nations of the land to join them, to seek the Lord God of Israel, ate the Passover.

You gave through Your servants the prophets, saying: “The land you are entering to possess is an impure land. The surrounding peoples have filled it from end to end with their uncleanness by their impurity and detestable practices.