2.3.56
जासिनिप्रहणनाटक्राथपिषां हिंसायाम्
Operational rule vidhi
The object of the verbs जासि 'to strike', 'to hurt', हन् 'to strike' preceded by नि and ग्र , नाट् 'to injure', क्राथ and पिष when they mean 'to injure', takes the 6th-Case-affix.
Word by word (padaccheda)
Target जासि- निप्रहण- नाट- क्राथ- पिषाम् ṣaṣṭhī · bahuvacanaRight context हिंसायाम् saptamī · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
Full reading
जासि-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The object of the verbs जासि 'to strike', 'to hurt', हन् 'to strike' preceded by नि and ग्र , नाट् 'to injure', क्राथ and पिष when they mean 'to injure', takes the 6th-Case-affix.
चौरस्य उज्जासयति, निप्रहन्ति, निहन्ति, प्रहन्ति, प्रणिहन्ति, उन्नाटयति, क्राथयति, पिनष्टि वा, 'he injures the thief.'
The root जसु belonging to the Churadi class should be taken, and not Divadi. हन with the prepositions pra and ni may be taken in any order. The root क्रथ् takes in the causative vriddhi irregularly. The verb is Bhvadi and falls into the subdivision ghatadi, and is called there a मित् verb; all मित् verbs shorten their penultimate before the causative affix णिच् 6.4.92. Thus क्राथ is an irregularity.
Why do we say 'when meaning to injure'? Observe धानाः पिनष्टि 'he pounds the barley.'
The word शेष is also understood here as चौरमुज्जासयति. Only these govern the genitive, not so here चौरं हिनस्ति. चौरं विहन्ति ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.