Pāṇini sūtras

For the da of dadha (the reduplicated form of dhā) is substituted dha, before the affixes beginning with ta, tha, sa and before dhvam

1. dadhaḥदधः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dadhदध्	dadhaḥदधः	dhāधा	dadhदध् + plus aḥअः

2. ta+thoḥत+थोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   tत्	taत	taत	takāraतकार	tत् + plus aअ
   tत्	thथ्	thoḥथोः	thakāraथकार	thथ् + plus oḥओः

3. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच

Anuvṛtti

1. jha+liझ+लि 8·2·26

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   jज्	jhaझ	jhaझ	jhakāraझकार	jhझ् + plus aअ
   lल्	lल्	liलि	LL	lल् + plus iइ

2. caच 8·2·29

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	and	caच

3. dhātoḥधातोः 8·2·32

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dhātuधातु	dhātoḥधातोः	Sanskrit verbal root	dhātधात् + plus oḥओः

4. s+dhvoḥस्+ध्वोः 8·2·37

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sस्	sस्	sakāraसकार	sस्
   dद्	dhvaध्व	dhvoḥध्वोः	dhvam	dhvध्व् + plus oḥओः