Natyashastra
घनस्तु तालो विज्ञेयः सुषिरो वंश एव च । प्रवेशाक्षेपनिष्क्रामप्रासादिकमथान्तरम् ॥२९॥
The solid (Ghanu) is to be understood as the rhythm (Tāla), the hollow (Suṣiro) as the flute (Vaṃśa), and the entrance, dismissal, exit, and the palace-like structures (Praveśākṣepa, Niṣkrāma, Prāsādika) represent various transitions or movements in the context.
english translation
ghanastu tAlo vijJeyaH suSiro vaMza eva ca । pravezAkSepaniSkrAmaprAsAdikamathAntaram ॥29॥
hk transliteration by Sanscript