Declension table of ?ṛchya

Neuter	Singular	Dual	Plural
Nominative	ṛchyam	ṛchye	ṛchyāni
Vocative	ṛchya	ṛchye	ṛchyāni
Accusative	ṛchyam	ṛchye	ṛchyāni
Instrumental	ṛchyena	ṛchyābhyām	ṛchyaiḥ
Dative	ṛchyāya	ṛchyābhyām	ṛchyebhyaḥ
Ablative	ṛchyāt	ṛchyābhyām	ṛchyebhyaḥ
Genitive	ṛchyasya	ṛchyayoḥ	ṛchyānām
Locative	ṛchye	ṛchyayoḥ	ṛchyeṣu

Compound ṛchya -

Adverb -ṛchyam -ṛchyāt