'Covenant' in the Bible

Abner sent messengers as his representatives to say to David, “Whose land is it? Make your covenant with me, and you can be certain I am on your side to hand all Israel over to you.”

David replied, “Good, I will make a covenant with you. However, there’s one thing I require of you: Do not appear before me unless you bring Saul’s daughter Michal here when you come to see me.”

Abner said to David, “Let me now go and I will gather all Israel to my lord the king. They will make a covenant with you, and you will rule over all you desire.” So David dismissed Abner, and he went in peace.

So all the elders of Israel came to the king at Hebron. King David made a covenant with them at Hebron in the Lord’s presence, and they anointed David king over Israel.

Zadok was also there, and all the Levites with him were carrying the ark of the covenant of God. They set the ark of God down, and Abiathar offered sacrifices until the people had finished marching past.

Is it not true my house is with God?For He has established an everlasting covenant with me,ordered and secured in every detail.Will He not bring aboutmy whole salvation and my every desire?