Declension table of ?ṛtvan

Masculine	Singular	Dual	Plural
Nominative	ṛtvā	ṛtvānau	ṛtvānaḥ
Vocative	ṛtvan	ṛtvānau	ṛtvānaḥ
Accusative	ṛtvānam	ṛtvānau	ṛtvanaḥ
Instrumental	ṛtvanā	ṛtvabhyām	ṛtvabhiḥ
Dative	ṛtvane	ṛtvabhyām	ṛtvabhyaḥ
Ablative	ṛtvanaḥ	ṛtvabhyām	ṛtvabhyaḥ
Genitive	ṛtvanaḥ	ṛtvanoḥ	ṛtvanām
Locative	ṛtvani	ṛtvanoḥ	ṛtvasu

Compound ṛtva -

Adverb -ṛtvam