Hebrews 7:2, 21

to whom also Abraham apportioned a tenth part of all the spoils, was first of all, by the translation of his name, king of righteousness, and then also king of Salem, which is king of peace.

(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’ ”)