Execution by drowning
Drowning as a method of execution is attested very early in history, for a large variety of cultures and as the method of execution for many types of offences.
Prohibition on shedding royal blood
In a variety of cultures, taboos against shedding the blood of royals are attested, and in many cultures, when the execution of a king or members of the royal family was thought necessary, they were drowned to avoid the spilling of blood. In Cambodia, for example, drowning was the type of execution reserved for members of the royal family. Felix Carey, missionary in Burma 1806–1812, describes the process as follows:In another Asian country, the Kingdom of Assam, it was a royal privilege to execute people by shedding their blood; lower courts of justice could only order death by drowning, death by cudgelling in the head of the condemned and so on.
Within Islamic cultures as well, some examples exist that the royal person, or members of the royal family ought not be executed by means of bloodshed, or members of similarly highly respected families. For example, in the former Sultanate of Pattani, in nowadays southern Thailand one rebel, Tuk Mir, was drowned in the sea, out of respect for his recognized status as Syed, that is, a direct descendant of Muhammad. Within the Ottoman Empire, it became, for some time, a practice to execute the brothers of the chosen sultan in order to prevent political succession crises; but these members of the royal family were typically strangled or drowned, so that their blood would not be shed.
The reluctance to shed the king's blood is also attested within a number of African cultures. In his "The Golden Bough", James Frazer refers to this custom of drowning royal offenders instead both among the Ashanti people and in the kingdom of Dahomey. Frazer also provides a number of other examples of executions of royals such that blood would not be shed, for example by means of strangling, starving or burning to death the royal personage.