Natyashastra
तालमात्रान्तरे न्यस्तस्त्र्यश्रः पक्षस्थितोऽपरः । प्रसन्नमाननमुरः समं यत्र समुन्नतम् ॥ १६२॥
Where the Tryaśra (obliquely placed) foot is set at a distance of one Tāla and placed to the side, and the face is pleasant, the chest even, and the body upright—this is the posture described.
english translation
tAlamAtrAntare nyastastryazraH pakSasthito'paraH । prasannamAnanamuraH samaM yatra samunnatam ॥ 162॥
hk transliteration by Sanscript