ओषधेरजातौ

Operational rule vidhi

The affix अण् comes after ओषधि when it does not mean a species.

Word by word (padaccheda)

Left context ओषधेः pañcamī · ekavacanaRight context अजातौ saptamī · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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. Hover or tap one to see its card.

Full reading

ओषधेः अजातौ

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

Commentary

The affix अण् comes after ओषधि when it does not mean a species.
Thus औषधं पिबति "he drinks medicine". औषधं ददाति "he gives medicines". Why do we say "when not meaning a जाति or species". Observe, औषधयः क्षेत्र रूढा भवन्ति 'the herbs are growing in the field.'

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