'Themselves' in the Bible

I said in my heart concerning the matter of the sons of man that God might cleanse them, so as to see that they themselves are beasts.

If the thick clouds are full of rain, On the earth they empty themselves; And if a tree doth fall in the south or to the north, The place where the tree falleth, there it is.

In the day that keepers of the house tremble, And men of strength have bowed themselves, And grinders have ceased, because they have become few. And those looking out at the windows have become dim,