Natyashastra
विनिवृत्ते त्वपसृतं पार्श्वमर्थवशाद्भवेत् । एतानि पार्श्वकर्माणि जठरस्य निबोधत ॥ २४२॥
When the side is drawn away due to some reason, it is called Apasṛta. Now, listen to the movements of the belly.
english translation
vinivRtte tvapasRtaM pArzvamarthavazAdbhavet । etAni pArzvakarmANi jaTharasya nibodhata ॥ 242॥
hk transliteration by Sanscript