Declension table of paurastya

Neuter	Singular	Dual	Plural
Nominative	paurastyam	paurastye	paurastyāni
Vocative	paurastya	paurastye	paurastyāni
Accusative	paurastyam	paurastye	paurastyāni
Instrumental	paurastyena	paurastyābhyām	paurastyaiḥ
Dative	paurastyāya	paurastyābhyām	paurastyebhyaḥ
Ablative	paurastyāt	paurastyābhyām	paurastyebhyaḥ
Genitive	paurastyasya	paurastyayoḥ	paurastyānām
Locative	paurastye	paurastyayoḥ	paurastyeṣu

Compound paurastya -

Adverb -paurastyam -paurastyāt