Declension table of ?hāsana

Masculine	Singular	Dual	Plural
Nominative	hāsanaḥ	hāsanau	hāsanāḥ
Vocative	hāsana	hāsanau	hāsanāḥ
Accusative	hāsanam	hāsanau	hāsanān
Instrumental	hāsanena	hāsanābhyām	hāsanaiḥ hāsanebhiḥ
Dative	hāsanāya	hāsanābhyām	hāsanebhyaḥ
Ablative	hāsanāt	hāsanābhyām	hāsanebhyaḥ
Genitive	hāsanasya	hāsanayoḥ	hāsanānām
Locative	hāsane	hāsanayoḥ	hāsaneṣu

Compound hāsana -

Adverb -hāsanam -hāsanāt