Declension table of ṛṣva

Neuter	Singular	Dual	Plural
Nominative	ṛṣvam	ṛṣve	ṛṣvāṇi
Vocative	ṛṣva	ṛṣve	ṛṣvāṇi
Accusative	ṛṣvam	ṛṣve	ṛṣvāṇi
Instrumental	ṛṣveṇa	ṛṣvābhyām	ṛṣvaiḥ
Dative	ṛṣvāya	ṛṣvābhyām	ṛṣvebhyaḥ
Ablative	ṛṣvāt	ṛṣvābhyām	ṛṣvebhyaḥ
Genitive	ṛṣvasya	ṛṣvayoḥ	ṛṣvāṇām
Locative	ṛṣve	ṛṣvayoḥ	ṛṣveṣu

Compound ṛṣva -

Adverb -ṛṣvam -ṛṣvāt