4.4.143
शिवशमरिष्टस्य करे
Operational rule vidhi
The affix तातिल् comes in the छन्दस् (Vedas) after the words 1. शिव 2. शम् and 3. अरिष्ट in the Genitive 6th-Case in construction when the sense is 'he does'.
Word by word (padaccheda)
Target शिव- शम्- अरिष्टस्य ṣaṣṭhī · ekavacanaRight context करे 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").
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Full reading
शिव-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix तातिल् comes in the छन्दस् (Vedas) after the words 1. शिव 2. शम् and 3. अरिष्ट in the Genitive 6th-Case in construction when the sense is 'he does'.
The word करः is equivalent to करोति formed by अच् 3.1.134
This shows that the construction must be genitive. With a krit-formed word, it has accusative force, as, शिवस्य करः = शिवं करोति ॥
Thus शिवस्य करः = शिवतातिः, So श॑तातिः and अरिष्टतातिः ॥ As याभिः॒ शन्ता॑ती॒ भव॑थो ददा॒शुषे॑ (Rig I.112.20) शंताती being dual of शन्तातिः, and meaning सुखस्य कर्तारौ; so also अथो अरिष्टतातये ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.