'Themselves' in the Bible

"Many nations will join themselves to Yahweh on that day, and they will be my people, and I will dwell in your midst. And you will know that Yahweh of hosts has sent me to you.

And the angel answered and said to me, "These [are] the four winds of the heavens going out after presenting themselves before the Lord of all the earth.

{And then} on that day I will make Jerusalem a stone weight for all the peoples. All those lifting it up will grievously hurt themselves, and all the nations of the earth will assemble against it.

And the clans of Judah will say {to themselves}, "The inhabitants of Jerusalem are a strength to us, through Yahweh of hosts, their God."

And the land shall mourn, {each clan by itself}; the clan of the house of David by itself, and their wives by themselves; the clan of the house of Nathan by itself, and their wives by themselves;

the clan of the house of Levi by itself, and their wives by themselves; the clan of the Shimeites by itself, and their wives by themselves;

and all those clans remaining, {each clan by itself}, and their wives by themselves.'"