Pāṇini sūtras

The sixth case-affix is employed after a noun implying the cause of an action, when the word hetu is used along with such a word.

1. ṣaṣṭhīषष्ठी

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   ṣष्	ṣaṣ̊षष्̊	ṣaṣṭhīषष्ठी	genitive	ṣaṣṭhषष्ठ् + plus īई

2. hetu+prayogeहेतु+प्रयोगे

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   hह्	hetuहेतु	hetuहेतु	hetu [word]	hetहेत् + plus uउ
   pप्	prayogaप्रयोग	prayogeप्रयोगे	combination	prayogप्रयोग् + plus eए

Anuvṛtti

1. a+abhinihiteअ+अभिनिहिते 2·3·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	naन	aअ	not	naन
   aअ	abhidhāअभिधा	abhinihiteअभिनिहिते	express	abhihitअभिहित् + plus iteइते

2. hetauहेतौ 2·3·23

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   hह्	hetuहेतु	hetauहेतौ	cause	hetहेत् + plus auऔ