One day, while the Buddha was living at jetavana vihara, the temple of Anathapindika millionaire, savathi city , kosala region, a faithful brahmana came to ask for ordination. Sariputta was assigned to give the ordination in sangha ceremony. In the middle country, the assembly to ten monks had to be held but in the outskirts of a country, the assembly of five monks had to be held for ordination. One of them was the preceptor certifying a person who was becoming a monk. One other monk had to inform sangha. In the present , only two monks are used in common. They are called kammavacacariya and Anusavanacariya. General people call them Gusuat.