'My Covenant' in the Bible

For the mountains may depart, and the hills may sway, but my faithfulness shall not depart from you, and my covenant of peace shall not sway," says Yahweh, who has compassion on you,

For thus says Yahweh, "To the eunuchs who keep my Sabbaths, and choose that in which I delight, and who keep hold of my covenant.

And the {foreigners} [who] join themselves to Yahweh to serve him and to love the name of Yahweh, to become his servants, every one who keeps [the] Sabbath, {so as not to profane} it, and those who keep hold of my covenant,

"And as for me, this [is] my covenant with them, says Yahweh: my spirit that [is] upon you, and my words that I have placed in your mouth shall not depart from your mouth, or from the mouths of your {children}, or from the mouths of {your children's children}," says Yahweh, "from now on and forever."