'My People' in the Bible

I have heard the reproach of Moab, and the revilings of the children of Ammon, wherewith they have reproached my people, and magnified themselves against their border.

Therefore as I live, saith Jehovah of hosts, the God of Israel, Surely Moab shall be as Sodom, and the children of Ammon as Gomorrah, a possession of nettles, and saltpits, and a perpetual desolation: the residue of my people shall make a prey of them, and the remnant of my nation shall inherit them.