Natyashastra
एभ्योऽन्ये बहवो भेदा लोकाभिनयसंश्रिताः । ते च लोकस्वभावेन प्रयोक्तव्या प्रयोक्तृभिः ॥ ३८॥
In addition to these, there are many other variations of gestures, based on the conventions of daily life. These should be performed by actors in accordance with the natural behavior of people.
english translation
ebhyo'nye bahavo bhedA lokAbhinayasaMzritAH । te ca lokasvabhAvena prayoktavyA prayoktRbhiH ॥ 38॥
hk transliteration by Sanscript