Declension table of ṛca

Masculine	Singular	Dual	Plural
Nominative	ṛcaḥ	ṛcau	ṛcāḥ
Vocative	ṛca	ṛcau	ṛcāḥ
Accusative	ṛcam	ṛcau	ṛcān
Instrumental	ṛcena	ṛcābhyām	ṛcaiḥ ṛcebhiḥ
Dative	ṛcāya	ṛcābhyām	ṛcebhyaḥ
Ablative	ṛcāt	ṛcābhyām	ṛcebhyaḥ
Genitive	ṛcasya	ṛcayoḥ	ṛcānām
Locative	ṛce	ṛcayoḥ	ṛceṣu

Compound ṛca -

Adverb -ṛcam -ṛcāt