'Therein' in the Bible

The Lord Jehovah hath sworn by himself, saith Jehovah, the God of hosts, I abhor the pride of Jacob, and hate his palaces; and I will deliver up the city with all that is therein.

Shall not the land tremble for this, and every one mourn that dwelleth therein? And it shall wholly rise up like the Nile; and it shall surge and sink down, as the river of Egypt.

And the Lord Jehovah of hosts is he that toucheth the land, and it melteth, and all that dwell therein shall mourn; and it shall wholly rise up like the Nile, and sink down as the river of Egypt.