6.1.188 स्वपादिहिंसामच्यनिटि

Word by word (padaccheda)

Target स्वपादिः- हिंसाम् ṣaṣṭhī · bahuvacanaRight context saptamī · ekavacanaRight context अनिटि 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").

Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.

Full reading

स्वपादिः-हिंसाम् अनिटि

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The acute accent is optionally on the first syllable when a Personal-ending, being सार्वधातुक tense affix beginning with a vowel, provided that the vowel is not the augment इट् , follows after स्वप् etc., or after हिंस्।
The phrase लसार्वधातुके in the locative case is understood here. Thus स्व꣡पन्ति or स्वप꣡न्ति, श्व꣡सन्ति or श्वस꣡न्ति, हिं꣡सन्ति or हिंस꣡न्ति ॥ The accent on the middle falls by the accent of the affix 3.1.3. Why do we say 'before an affix beginning with a vowel'? Observe स्वप्या꣡त्, हिंस्या꣡त् ॥ Why do we say 'not taking the augment इट्?' Observe स्वपितः꣡ and श्वसितः꣡ ॥ This rule applies to those vowel-beginning affixes which are ङित्; it does not apply to स्व꣡पानि, हिन꣡सानि ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.