Natyashastra
पञ्चपाणिविधानेन यथोक्तेनैव तद्भवेत् । द्वितीयपाततालेन ह्यपपातश्च कीर्त्यते ॥ २८९॥
By following the procedure of the Pañcapāṇi as described, the same form arises; and the fall occurring in the second Pāta of the Tāla is called Apapāta (the secondary fall).
english translation
paJcapANividhAnena yathoktenaiva tadbhavet । dvitIyapAtatAlena hyapapAtazca kIrtyate ॥ 289॥
hk transliteration by Sanscript