1.2.25
तृषिमृषिकृशेः काश्यपस्य
Extension atideśa अकित्त्वातिदेशः
The सेट् क्त्वा is optionally कित् , according to the opinion of ऋषि काश्यप after the verbs तृष् 'to be thirsty', मृष् 'to sprinkle' and कृश् 'to become lean'.
Word by word (padaccheda)
Left context तृषि- मृषि- कृशेः pañcamī · ekavacanaTarget काश्यपस्य ṣaṣṭhī · ekavacana
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Full reading
तृषि-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The सेट् क्त्वा is optionally कित् , according to the opinion of ऋषि काश्यप after the verbs तृष् 'to be thirsty', मृष् 'to sprinkle' and कृश् 'to become lean'.
As तृषित्वा or तर्षित्वा 'having thirsted,' मृषित्वा or मर्षित्वा 'having sprinkled,' कृशित्वा or कर्शित्वा 'having become lean.' By sutra 1.2.18, the set ktva is never kit. This sutra adds another exception to that general rule.
The special mention of Kasyapa is for the sake of showing respect. The वा is already understood in this sutra by Anuvritti from sutra 1.2.23.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.