'My People' in the Bible

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

Therefore as I live, saith the LORD of hosts, the God of Israel, Surely Moab shall be as Sodom, and the children of Ammon as Gomorrah, even the breeding of nettles, and saltpits, and a perpetual desolation: the residue of my people shall spoil them, and the remnant of my people shall possess them.