Declension table of ?rāsana

Masculine	Singular	Dual	Plural
Nominative	rāsanaḥ	rāsanau	rāsanāḥ
Vocative	rāsana	rāsanau	rāsanāḥ
Accusative	rāsanam	rāsanau	rāsanān
Instrumental	rāsanena	rāsanābhyām	rāsanaiḥ rāsanebhiḥ
Dative	rāsanāya	rāsanābhyām	rāsanebhyaḥ
Ablative	rāsanāt	rāsanābhyām	rāsanebhyaḥ
Genitive	rāsanasya	rāsanayoḥ	rāsanānām
Locative	rāsane	rāsanayoḥ	rāsaneṣu

Compound rāsana -

Adverb -rāsanam -rāsanāt