Natyashastra
चत्वारः पादभागाश्च ?? हि परिनाट्यते । चञ्चत्पुटस्य तालस्य तथा चञ्चूपुटस्य च ॥ ५२॥
The four pāda-bhāgas are indeed applied in the case of a cancatpuṭa tāla as well as in a cancūpuṭa tāla.
english translation
catvAraH pAdabhAgAzca ?? hi parinATyate । caJcatpuTasya tAlasya tathA caJcUpuTasya ca ॥ 52॥
hk transliteration by Sanscript