And when the sense is that of addressing, the 1st case-affix is used.,
Ex. हे राम 'O Ram' हे रामौ, हे रामाः ॥,
Adhyāya 2 · Pāda 3 · Rule 47
And when the sense is that of addressing, the 1st case-affix is used.,
Ex. हे राम 'O Ram' हे रामौ, हे रामाः ॥,