'Elect' in the Bible

I have made a covenant with mine elect, I have sworn unto David my servant:

“And though a tenth [of the people] remain in the land,It will again be subject to destruction [consumed and burned],Like a massive terebinth tree or like an oakWhose stump remains when it is chopped down.The holy seed [the elect remnant] is its stump [the substance of Israel].”

Behold my servant, whom I uphold; mine elect, in whom my soul delighteth; I have put my spirit upon him: he shall bring forth judgment to the Gentiles.

For Jacob my servant's sake, and Israel mine elect, I have even called thee by thy name: I have surnamed thee, though thou hast not known me.

And I will bring forth a seed out of Jacob, and out of Judah an inheritor of my mountains: and mine elect shall inherit it, and my servants shall dwell there.

And ye shall leave your name for a curse unto mine elect; for the Lord Jehovah will slay thee, and will call his servants by another name:

They shall not build, and another inhabit; they shall not plant, and another eat: for as the days of a tree are the days of my people, and mine elect shall long enjoy the work of their hands.