instrument.66 Nevertheless, biblical and Second Temple covenantal texts do not use the specific legal terminology that Paul is employing in Gal. 3:15–17. Again, that legal terminology would have been familiar to the Galatian audience from a “last will and testament”: “ratify a will” (κυρόω διαθήκην), “annul a will” (ἀθετέω), “add a codicil” (ἐπιδιατάσσομαι).67 The testament or will is likewise irrevocable and inalterable by anyone other than the testator. Indeed, Josephus and Philo employ διαθήκη