'My Covenant' in the Bible

Gather yourselves unto me - ye my men of lovingkindness, Who have solemnised my covenant over sacrifice.

But, to the lawless one, God saith, What hast, thou, to do, to recount my statutes? Or that thou hast taken up my covenant upon thy mouth?

Age-abidingly, will I keep for him my lovingkindness, And, my covenant, hath been made steadfast for him;

I will not violate my covenant, And that which hath proceeded out of my lips, will I not alter:

If thy sons keep my covenant, and my testimony which I will teach them, even their sons, unto futurity, shall sit on thy throne.