Natyashastra
आसन्नोक्तन्तु यद्वाक्यं न शृण्वन्ति परस्परम् । अनुक्तं श्रूयते वाक्यं नाट्यधर्मी तु सा स्मृता ॥ ७५॥
When a statement is made but not heard by the other party, and another statement is heard without being spoken, it is considered in accordance with the principles of drama.
english translation
Asannoktantu yadvAkyaM na zaRNvanti parasparam । anuktaM zrUyate vAkyaM nATyadharmI tu sA smRtA ॥ 75॥
hk transliteration by Sanscript