6.2.152
सप्तम्याः पुण्यम्
Operational rule vidhi
The word पुण्य has acute accent (उदात्त) on the final when preceded by a Noun in the Locative -7th case.
Word by word (padaccheda)
Left context सप्तम्याः pañcamī · ekavacanaSubstitute / term पुण्यम् prathamā · ekavacana
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Full reading
सप्तम्याः पुण्यम्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The word पुण्य has acute accent (उदात्त) on the final when preceded by a Noun in the Locative -7th case.
Thus अध्ययने पुण्यम् = अध्ययनपुण्य꣡म्, वेदपुण्य꣡म् ॥ The compounding takes place by 2.1.40 by the process of splitting the sutra (yoga-vibhaga), taking सप्तमी there as a full sutra, and शौण्डैः another. Here by 6.2.2, the first member would have preserved its accent, the present sutra supersedes that and ordains acute on the final. The word पुण्य is derived by the Unadi affix यत् (Unadi V. 15) and would have retained its natural accent 6.1.213 and thus get acute on the first syllable by krit-accent. 6.2.139. Why do we say 'a locative case'? Observe वेदेन पुण्यं = वेदपुण्यम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.