Shiva Purana
देवौ ततः प्रजायेतामश्विनौ भिषजां वरौ ॥ नासत्यौ तौ च दस्रौ च स्मृतौ द्वावश्विनावपि ॥ ३४॥
Thence were born the twin gods Aśvins, the foremost among physicians. They are known as Nāsatyas and Dasras.
english translation
devau tataH prajAyetAmazvinau bhiSajAM varau ॥ nAsatyau tau ca dasrau ca smRtau dvAvazvinAvapi ॥ 34॥
hk transliteration by Sanscript