Declension table of upāsya

Neuter	Singular	Dual	Plural
Nominative	upāsyam	upāsye	upāsyāni
Vocative	upāsya	upāsye	upāsyāni
Accusative	upāsyam	upāsye	upāsyāni
Instrumental	upāsyena	upāsyābhyām	upāsyaiḥ
Dative	upāsyāya	upāsyābhyām	upāsyebhyaḥ
Ablative	upāsyāt	upāsyābhyām	upāsyebhyaḥ
Genitive	upāsyasya	upāsyayoḥ	upāsyānām
Locative	upāsye	upāsyayoḥ	upāsyeṣu

Compound upāsya -

Adverb -upāsyam -upāsyāt