Pāṇini sūtras

After the verb vah to bear, coming after pra, parasmaipada is used, even though the fruit of the action accrues to the agent.

German Auch an vah (ist gleichfalls svaritet) nach pra. (81)

1. prāt+vahaḥप्रात्+वहः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	praप्र	prātप्रात्	praप्र	prप्र् + plus ātआत्
   vव्	vahवह्	vahaḥवहः	vahवह्	vahवह् + plus aḥअः

Anuvṛtti

1. parasmaipadamपरस्मैपदम् 1·3·78

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	parasmaipadaपरस्मैपद	parasmaipadamपरस्मैपदम्	active voice	parasmaipadपरस्मैपद् + plus amअम्