'My Covenant' in the Bible

Nevertheless I will remember my covenant with you in the days of your youth, and I will establish to you an everlasting covenant.

I will establish my covenant with you; and you shall know that I am the LORD;

"Therefore thus says the Lord GOD: 'As I live, surely my oath that he has despised, and my covenant that he has broken, I will even bring it on his own head.

in that you have brought in foreigners, uncircumcised in heart and uncircumcised in flesh, to be in my sanctuary, to profane it, even my house, when you offer my bread, the fat and the blood, and you have broken my covenant, to add to all your abominations.