### Core Meaning & Semantic Range
The Greek word **horkōmosía**, represented by `{{G3728}}`, is defined as an asseveration on oath, or simply an **oath**. It is a specific term that appears **4 times** across **3 unique verses** in the Bible, with all of its occurrences found within a single chapter of the New Testament.
### Biblical Occurrences & Contextual Analysis
In the biblical text, `{{G3728}}` is used exclusively in Hebrews chapter 7 to establish a critical contrast. It distinguishes the priesthood of Christ from the Levitical priesthood. The author states that the Levitical priests were made "without an **oath**" [[Hebrews 7:21]]. In direct contrast, Christ was made a priest "with an **oath**" ([[Hebrews 7:20]], [[Hebrews 7:21]]). The passage culminates by explaining that "the word of the **oath**" is what establishes the Son as a high priest who is "consecrated for evermore" [[Hebrews 7:28]].
### Related Words & Concepts
Several related words provide context for the act and declaration associated with an oath:
* `{{G3660}}` **omnýō**: This word means to **swear**, or to take or declare on oath. It is the very action that gives an oath its power, as seen in the declaration, "The Lord **sware** and will not repent" [[Hebrews 7:21]].
* `{{G3004}}` **légō**: This verb means to "lay" forth or relate in words, often translated as to **say** or speak. It is the means by which the oath is delivered, as Christ's priesthood was established "by him that **said** unto him" the divine promise [[Hebrews 7:21]].
### Theological Significance
The theological weight of `{{G3728}}` is concentrated on the nature of Christ's high priesthood.
* **A Superior Priesthood:** The presence of a divine **oath** elevates Christ's priesthood, setting it apart from the Levitical priests who were appointed without one and had infirmity ([[Hebrews 7:21]], [[Hebrews 7:28]]).
* **A Divine Guarantee:** The **oath** is not a human promise but a divine one, directly linked to God's own act to **swear** `{{G3660}}`. This establishes the eternal and unchangeable nature of Christ's appointment as priest [[Hebrews 7:21]].
* **An Eternal Consecration:** It is specifically "the word of the **oath**" which makes the Son a high priest forever [[Hebrews 7:28]]. The oath serves as the foundation for his permanent and perfect ministry.
### Summary
In summary, `{{G3728}}` is more than a simple word for a promise. It functions as a key theological marker in the book of Hebrews. Its limited but powerful usage serves to underscore the finality, authority, and superiority of Christ's priesthood, which, unlike the temporary priesthood of men, is guaranteed by a divine and unbreakable **oath**.
TRV