'Itself' in the Bible

I know Ephraim all too well; the evil of Israel is not hidden from me. For you have engaged in prostitution, O Ephraim; Israel has defiled itself.

I have seen a disgusting thing in the temple of Israel: there Ephraim practices temple prostitution and Judah defiles itself.

Ephraim has mixed itself like flour among the nations; Ephraim is like a ruined cake of bread that is scorched on one side.