'Themselves' in the Bible

Woe to them! For they have traveled in the way of Cain, and have given themselves up to the error of Balaam for gain, and have perished in the rebellion of Korah.

These are the ones feasting together without reverence, hidden reefs at your love feasts, caring for themselves, waterless clouds carried away by winds, late autumn trees without fruit, twice dead, uprooted,