Natyashastra
एवमेष प्रयोक्तव्यः स्त्रीपुंसाभिनये करः । पताकाभ्यां तु हस्ताभ्यामभिनेयः प्रयोक्तृभिः ॥ २६॥
Thus, this hand should also be used to represent a man and a woman. It should be performed by actors using both hands in the Patāka gesture.
english translation
evameSa prayoktavyaH strIpuMsAbhinaye karaH । patAkAbhyAM tu hastAbhyAmabhineyaH prayoktRbhiH ॥ 26॥
hk transliteration by Sanscript