Declension table of upastha

Masculine	Singular	Dual	Plural
Nominative	upasthaḥ	upasthau	upasthāḥ
Vocative	upastha	upasthau	upasthāḥ
Accusative	upastham	upasthau	upasthān
Instrumental	upasthena	upasthābhyām	upasthaiḥ upasthebhiḥ
Dative	upasthāya	upasthābhyām	upasthebhyaḥ
Ablative	upasthāt	upasthābhyām	upasthebhyaḥ
Genitive	upasthasya	upasthayoḥ	upasthānām
Locative	upasthe	upasthayoḥ	upastheṣu

Compound upastha -

Adverb -upastham -upasthāt