'Covenant' in the Bible

And Abner said unto David, I will arise and go, and will gather all Israel unto my lord the king, that they may make a covenant with thee, and that thou mayest reign over all that thy soul desireth. And David sent Abner away; and he went in peace.

So all the elders of Israel came to the king to Hebron; and king David made a covenant with them in Hebron before Jehovah: and they anointed David king over Israel.

And, lo, Zadok also came , and all the Levites with him, bearing the ark of the covenant of God; and they set down the ark of God; and Abiathar went up, until all the people had done passing out of the city.

Verily my house is not so with God; Yet he hath made with me an everlasting covenant, Ordered in all things, and sure: For it is all my salvation, and all my desire, Although he maketh it not to grow.