Declension table of upāsya

Masculine	Singular	Dual	Plural
Nominative	upāsyaḥ	upāsyau	upāsyāḥ
Vocative	upāsya	upāsyau	upāsyāḥ
Accusative	upāsyam	upāsyau	upāsyān
Instrumental	upāsyena	upāsyābhyām	upāsyaiḥ upāsyebhiḥ
Dative	upāsyāya	upāsyābhyām	upāsyebhyaḥ
Ablative	upāsyāt	upāsyābhyām	upāsyebhyaḥ
Genitive	upāsyasya	upāsyayoḥ	upāsyānām
Locative	upāsye	upāsyayoḥ	upāsyeṣu

Compound upāsya -

Adverb -upāsyam -upāsyāt