Natyashastra
विच्युतश्च सशब्दश्च कार्यो निर्भत्सनादिषु । बालालापे च शीघ्रे च ताले विश्वासने तथा ॥ १०३॥
It should fall down with a sound to represent rebuke, pride of power, quickness, beating time and producing confidence.
english translation
vicyutazca sazabdazca kAryo nirbhatsanAdiSu । bAlAlApe ca zIghre ca tAle vizvAsane tathA ॥ 103॥
hk transliteration by Sanscript