In the Vedas, the two stars viśākhā may optionally be in the singular number.,
The word विशाखा is in the dual number as a rule. In the Vedas, it is found sometime to have the singular form, denoting duality. Thus विशाखा नक्षत्रम् or विशाखे नक्षत्रमिन्द्राग्नी देवता ॥,