Declension table of ?ṛtasthā

Masculine	Singular	Dual	Plural
Nominative	ṛtasthāḥ	ṛtasthau	ṛtasthāḥ
Vocative	ṛtasthāḥ	ṛtasthau	ṛtasthāḥ
Accusative	ṛtasthām	ṛtasthau	ṛtasthāḥ ṛtasthaḥ
Instrumental	ṛtasthā	ṛtasthābhyām	ṛtasthābhiḥ
Dative	ṛtasthe	ṛtasthābhyām	ṛtasthābhyaḥ
Ablative	ṛtasthaḥ	ṛtasthābhyām	ṛtasthābhyaḥ
Genitive	ṛtasthaḥ	ṛtasthoḥ	ṛtasthām ṛtasthanām
Locative	ṛtasthi	ṛtasthoḥ	ṛtasthāsu

Compound ṛtasthā -

Adverb -ṛtastham