Declension table of vayasya

Neuter	Singular	Dual	Plural
Nominative	vayasyam	vayasye	vayasyāni
Vocative	vayasya	vayasye	vayasyāni
Accusative	vayasyam	vayasye	vayasyāni
Instrumental	vayasyena	vayasyābhyām	vayasyaiḥ
Dative	vayasyāya	vayasyābhyām	vayasyebhyaḥ
Ablative	vayasyāt	vayasyābhyām	vayasyebhyaḥ
Genitive	vayasyasya	vayasyayoḥ	vayasyānām
Locative	vayasye	vayasyayoḥ	vayasyeṣu

Compound vayasya -

Adverb -vayasyam -vayasyāt