'Expiation' in the Bible

"'So you shall not pollute the land in which you are: for blood, it pollutes the land; and no expiation can be made for the land for the blood that is shed therein, but by the blood of him who shed it.

Rejoice, you nations, [with] his people, for he will avenge the blood of his servants. He will render vengeance to his adversaries, And will make expiation for his land, for his people.