先陀婆Saindhava之略。涅槃經九曰：「先陀婆者一名四實：一者鹽，二者器，三者水，四者馬，如是四法皆同其名。有智之臣善知此名，若王洗時索先陀婆即便奉水，若王食時索先陀婆即便奉鹽，若王食已將欲飲漿索先陀婆即便奉器，若王欲遊索先陀婆即便奉馬。如是智臣善解大臣四種密語。」
(先陀婆) Saindhava, interpreted as salt, a cup, water, and a horse; born or produced in Sihdh, or near the Indus; also a minister of state in personal attendance on the king.