Notice that God changed the priests by swearing an oath. The ones from Levi’s family line became priests without God swearing an oath.
In another place God said, “You are a priest forever, in the order of Melchizedek.”
The law didn’t make anything perfect, but a better hope has now been given to us, and it brings us near to God.
But when Jesus became a priest, God confirmed this with an oath when he said to him, “The Lord has sworn an oath and he won’t change his mind. He has said, ‘You are a priest forever.’ ”