7.1.41
लोपस्त आत्मनेपदेषु
Operational rule vidhi
In the छन्दस् (Vedas) the त of the आत्मनेपद personal ending is elided.
Word by word (padaccheda)
Substitute / term prathamā · ekavacanaTarget तः ṣaṣṭhī · ekavacanaRight context saptamī · bahuvacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- 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
तः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
तः → /
Replace taḥ with lopaḥ when ātmanepadeṣu follows. Inherited words (anuvṛtti) may add further conditions.
Commentary
In the छन्दस् (Vedas) the त of the आत्मनेपद personal ending is elided.
As देवा अदुह्र and गन्धर्वा अप्सरसो अदुह्र for अदुहत् (see 7.1.8); दुहाम् (for दुग्धाम्) अश्विभ्यां पयो अघ्न्येयम् ॥ Rig I.164.27. दक्षिणतः शये for शेते ॥ Owing to the anuvritti of अपि from 7.1.38, this substitution sometimes does not take place; as: आत्मानमनृतंकुरुते ॥ Why in the Atmanepada ? Observe वत्सं दुहन्ति कलशं चतुर्बिलम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.