Hebrews 7:18-22

For, on the one hand, there is a setting aside of a former commandment because of its weakness and uselessness (for the Law made nothing perfect), and on the other hand there is a bringing in of a better hope, through which we draw near to God. And inasmuch as it was not without an oath (for they indeed became priests without an oath, but He with an oath through the One who said to Him, “THE LORD HAS SWORN AND WILL NOT CHANGE HIS MIND, ‘YOU ARE A PRIEST FOREVER’ ”); so much the more also Jesus has become the guarantee of a better covenant.