'My Covenant' in the Bible

Nevertheless I will remember my covenant with thee in the days of thy youth, and I will establish unto thee an everlasting covenant.

And I will establish my covenant with thee; and thou shalt know that I am the LORD:

Therefore thus saith the Lord GOD; As I live, surely mine oath that he hath despised, and my covenant that he hath broken, even it will I recompense upon his own head.

In that ye have brought into my sanctuary strangers, uncircumcised in heart, and uncircumcised in flesh, to be in my sanctuary, to pollute it, even my house, when ye offer my bread, the fat and the blood, and they have broken my covenant because of all your abominations.