Hathayoga 1-23

Vîrâsana

एकं पादं तथैकस्मिन्विन्यसेदुरुणि स्थिरम् ।

इतरस्मिंस्तथा चोरुं वीरासनमितीरितम् ॥ २३॥

Ekam pādam tathaikasminvinyaseduruni sthiram Itarasmimstathā chorum vīrāsanamitīritam

One foot is to be placed on the thigh of the opposite side; and so also the other foot on the opposite thigh. This is called Vîrâsana.