Declension table of hṛdaya

Neuter	Singular	Dual	Plural
Nominative	hṛdayam	hṛdaye	hṛdayāni
Vocative	hṛdaya	hṛdaye	hṛdayāni
Accusative	hṛdayam	hṛdaye	hṛdayāni
Instrumental	hṛdayena	hṛdayābhyām	hṛdayaiḥ
Dative	hṛdayāya	hṛdayābhyām	hṛdayebhyaḥ
Ablative	hṛdayāt	hṛdayābhyām	hṛdayebhyaḥ
Genitive	hṛdayasya	hṛdayayoḥ	hṛdayānām
Locative	hṛdaye	hṛdayayoḥ	hṛdayeṣu

Compound hṛdaya -

Adverb -hṛdayam -hṛdayāt