'Themselves' in the Bible

I have known thy works, and thy labour, and thy endurance, and that thou art not able to bear evil ones, and that thou hast tried those saying themselves to be apostles and are not, and hast found them liars,

I have known thy works, and tribulation, and poverty -- yet thou art rich -- and the evil-speaking of those saying themselves to be Jews, and are not, but are a synagogue of the Adversary.

lo, I make of the synagogue of the Adversary those saying themselves to be Jews, and are not, but do lie; lo, I will make them that they may come and bow before thy feet, and may know that I loved thee.

and there was given to each one white robes, and it was said to them that they may rest themselves yet a little time, till may be fulfilled also their fellow-servants and their brethren, who are about to be killed -- even as they.

and the kings of the earth, and the great men, and the rich, and the chiefs of thousands, and the mighty, and every servant, and every freeman, hid themselves in the dens, and in the rocks of the mountains,

And the seven messengers who are having the seven trumpets did prepare themselves that they may sound;

and weep over her, and smite themselves for her, shall the kings of the earth, who with her did commit whoredom and did revel, when they may see the smoke of her burning,