Pāṇini sūtras

The word catur, followed by the accusative plural, has acute accent on the last syllable.

German Von catur hat der Accusativ Pl. den Acut auf der Endsilbe. (167)

1. caturaḥचतुरः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   cच्	caturचतुर्	caturaḥचतुरः	catur [word]	caturचतुर् + plus aḥअः

2. śasiशसि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   śश्	śasशस्	śasiशसि	śasशस्	śasशस् + plus iइ

Anuvṛtti

1. udāttaḥउदात्तः 6·1·159

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	udāttaउदात्त	udāttaḥउदात्तः	udāttaउदात्त	udāttउदात्त् + plus aḥअः