Declension table of ?śāntahṛdaya

Masculine	Singular	Dual	Plural
Nominative	śāntahṛdayaḥ	śāntahṛdayau	śāntahṛdayāḥ
Vocative	śāntahṛdaya	śāntahṛdayau	śāntahṛdayāḥ
Accusative	śāntahṛdayam	śāntahṛdayau	śāntahṛdayān
Instrumental	śāntahṛdayena	śāntahṛdayābhyām	śāntahṛdayaiḥ śāntahṛdayebhiḥ
Dative	śāntahṛdayāya	śāntahṛdayābhyām	śāntahṛdayebhyaḥ
Ablative	śāntahṛdayāt	śāntahṛdayābhyām	śāntahṛdayebhyaḥ
Genitive	śāntahṛdayasya	śāntahṛdayayoḥ	śāntahṛdayānām
Locative	śāntahṛdaye	śāntahṛdayayoḥ	śāntahṛdayeṣu

Compound śāntahṛdaya -

Adverb -śāntahṛdayam -śāntahṛdayāt