Pāṇini sūtras

The augment num is added after the vowel of the root rabh before an affix beginning with a vowel, but not before the vikaraṇa śap or the affixes of the Perfect.

1. rabheḥरभेः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   rर्	rabhiरभि	rabheḥरभेः	rabhरभ्	rabhरभ् + plus eḥएः

2. a+śap+liṭoḥअ+शप्+लिटोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   śश्	śapशप्	śapशप्	śapशप्	śapशप्
   lल्	liṭलिट्	liṭoḥलिटोः	perfect	liṭलिट् + plus oḥओः

Anuvṛtti

1. numनुम् 7·1·58

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	numनुम्	numनुम्	numनुम्	numनुम्

2. a+ciअ+चि 7·1·61

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	akāraअकार	aअ
   cच्	cच्	ciचि	CC	cच् + plus iइ