en_tn_condensed/heb/07/16.md

This one became a priest

The words "This one" refer to the one who became priest in the likeness of Melchizedek.

not based on a law of physical requirement

He became priest, but it was not because he met the physical requrement.

a law of physical requirement

This physical requirement is that only the descendants of priests could become priests. Alternate translation: "a law of human descent" or "a law that required priests to be descendants of priests" (See: rc://en/ta/man/jit/figs-explicit)