Natyashastra
शिखरस्तु यदा हस्तो मृगशीर्षेण पीडितः । निषधो नाम विज्ञेयः स भयार्ते विधीयते ॥ १४३॥
When the Śikhara hand is pressed by the Mṛgaśīrṣa hand, it is known as Niṣadha. It is used to indicate fear and distress.
english translation
zikharastu yadA hasto mRgazIrSeNa pIDitaH । niSadho nAma vijJeyaH sa bhayArte vidhIyate ॥ 143॥
hk transliteration by Sanscript