'Better Covenant' in the Bible

And as he was not [constituted] without swearing,??21 for they were made priests without swearing, but he with swearing by him who says to him, The Lord swore, and he will not change, You are a priest forever;??22 by so much is Jesus the pledge of a better covenant.

but now he has obtained a more excellent service, by as much also as he is the mediator of a better covenant, which is established on better promises.