Oath

An oath (dhaar) is a formal declaration by which a person testifies to the truth of a statement or pledges to fulfill an obligation. What distinguishes an oath from an ordinary promise is that it is bound to matters a person is believed to hold sacred—such as the name of God, personal honor, or legal responsibility.

Oaths appear in courts, military forces, government offices, and community practice. Their purpose is to create consequences: a person who has sworn an oath faces legal penalties, public shame, or financial liability if the oath proves false or is broken.

How it works

An oath typically has three elements: the person swearing, what is sworn about, and what is pledged. The process usually follows visible marks—a raised hand, touching a religious text, or reciting fixed words solemnly. These marks signal that the act is formal, not casual speech.

Oaths in courts

In most legal systems, witnesses are required to swear an oath before giving testimony. Lying after taking an oath—called perjury in English—is a distinct crime, different from ordinary falsehood. Similarly, in some matters under Islamic law, the oath forms part of the method of proof when other evidence is absent.

Oaths in office and employment

Heads of state, judges, military commanders, and certain officials swear oaths when taking office. These oaths typically bind the person to the constitution or laws of the country, not to any individual. Some professions, such as medicine, have professional oaths that define the duties of the role.

Somali customary practice

In Somali customary law (xeer), the oath was a tool for resolving disputes when witnesses were absent, particularly in matters of injury, blood debt, and boundary disputes. A practice was used where a group swore together—the accused and a number of his kinsmen—to spread responsibility. Fear of the consequences of a false oath made this method work.