सो ऽचि लोपे चेत् पादपूरणम्

Karika

सैष दाशरथी रामः, सैष राजा युधिष्ठिरः॥
सैष कर्णो महात्यागी सैष भीमो महाबलः ॥

Thus सेदु राजा क्षयति चर्षणीनाम् (Rig I. 32. 15) सौषधीरनुरुध्यसे (Rig VIII. 43. 9). The case-ending being elided, the Sandhi takes place. Why do we say 'when by such elision the metre of the line is completed'? Observe स इव व्याघ्रो भवेत् ॥ The word अचि in the sutra is for the sake of distinctness:for the purposes of metre would not have been served by eliding the affix before a consonant, for then the syllables would remain the same. It is by sandhi that a syllable is lessened; and sandhi would take place only with a vowel. Some explain the word पाद as 'a foot of a Sloka' also, and according to them this rule is not confined to Vedic metres only. Thus we have:- सैष दाशरथी रामः, सैष राजा युधिष्ठिरः, सैष कर्णो महात्यागी सैष भीमो महाबलः ॥,