'Servant' in the Bible

“Is Israel a servant? Is he a slave by birth?Why has he become a captive and a prey?

behold (hear this), I will send for all the families of the north,’ says the Lord, ‘and I will send for Nebuchadnezzar king of Babylon, My servant [to enact My plan], and I will bring them against this land and against its inhabitants and against all these surrounding nations; and I will utterly destroy them and make them a horror and a hissing [that is, an object of warning and ridicule] and an everlasting desolation.

Now I have given all these lands into the hand of Nebuchadnezzar king of Babylon, My servant and instrument, and I have also given the wild animals of the field to serve him.

‘Fear not, O Jacob My servant,’ says the Lord,‘Nor be dismayed or downcast, O Israel;For behold, I will save you from a distant land [of exile]And your descendants from the land of their captivity.Jacob will return and will be quiet and at ease,And no one will make him afraid.

then My covenant may also be broken with David My servant so that he will not have a son to reign on his throne, and [My covenant may also be broken] with the Levitical priests, My ministers.

As the host of [the stars of] heaven cannot be counted and the sand of the sea cannot be measured, so I will multiply the descendants of David My servant and the Levites who minister to Me.’”

then I would [also] reject the descendants of Jacob and David My servant, not taking from his descendants rulers over the descendants of Abraham, Isaac, and Jacob. But I will restore their fortunes, and will have mercy on them.’”

and say to them, ‘Thus says the Lord of hosts, the God of Israel, “Behold, I am going to send and get Nebuchadnezzar the king of Babylon, My servant, and I am going to set his throne over these stones that I have hidden; and his [majestic, royal] canopy will be spread over them.

“But as for you, do not fear, O My servant Jacob,Nor be dismayed, O Israel!For behold, I will save you from [your captivity in] a distant land,And your descendants from the land of their exile;And Jacob will return and be quiet and secure,And no one will make him afraid.

“Do not fear, O Jacob My servant,” says the Lord,“For I am with you.For I will make a full and complete end of all the nationsTo which I have driven you;Yet I will not make a full end of you.But I will discipline and correct you appropriatelyAnd by no means will I declare you guiltless or leave you unpunished.”