Found exclusively in Hebrews 7, this noun denotes the formal act of swearing an oath. The author argues that Jesus' priesthood is superior because it was established 'with an oath' (Heb 7:20–21), unlike the Levitical priests who served 'without an oath-taking.' The climax comes in Heb 7:28, where the 'word of the oath' appoints the Son as permanent high priest. Spanish 'juramento' and French 'Eidschwur' (a German loanword in the data) both capture the gravity of a binding sworn declaration. The concentrated use in one chapter underscores its theological weight: God's oath is the unbreakable guarantee of the new covenant priesthood.