Natyashastra
अप्रियनिवेदनाद्यो विषादभावाश्रयोऽनुभावस्य । सहसारिदर्शनाच्चेत्पहरणपरिघट्टनैः कार्यः ॥ ६५॥
Agitation due to an unpleasant report, has as its Consequents assuming a sad look, and that due to a sudden appearance of enemy is to be represented by clash of weapons.
english translation
apriyanivedanAdyo viSAdabhAvAzrayo'nubhAvasya । sahasAridarzanAccetpaharaNaparighaTTanaiH kAryaH ॥ 65॥
hk transliteration by Sanscript