Natyashastra
भेदश्चञ्चत्पुटस्यादौ तथा गुरुलघुप्लुतैः । पञ्चपाणिं ततः कुर्याद्द्विरभ्यस्तं प्रयोगवित् ॥ ५५॥
At the beginning, the variation of the Cañcatpuṭa is made using heavy, light, and prolonged syllables; then, the expert in application should perform the Pañcapāṇi, repeating it twice.
english translation
bhedazcaJcatpuTasyAdau tathA gurulaghuplutaiH । paJcapANiM tataH kuryAddvirabhyastaM prayogavit ॥ 55॥
hk transliteration by Sanscript