Natyashastra
आद्यं चारालमुत्तानं कुर्यान्नाभिस्तनान्तरे । न निषण्णं न च स्तब्धं न चापि परिवाहितम् ॥ १८७॥
The first (right) hand should be in the Arāla gesture, held up between the navel and the breasts; the body should neither be relaxed, nor stiff, nor swinging.
english translation
AdyaM cArAlamuttAnaM kuryAnnAbhistanAntare । na niSaNNaM na ca stabdhaM na cApi parivAhitam ॥ 187॥
hk transliteration by Sanscript