Declension table of ?sāyatana

Masculine	Singular	Dual	Plural
Nominative	sāyatanaḥ	sāyatanau	sāyatanāḥ
Vocative	sāyatana	sāyatanau	sāyatanāḥ
Accusative	sāyatanam	sāyatanau	sāyatanān
Instrumental	sāyatanena	sāyatanābhyām	sāyatanaiḥ sāyatanebhiḥ
Dative	sāyatanāya	sāyatanābhyām	sāyatanebhyaḥ
Ablative	sāyatanāt	sāyatanābhyām	sāyatanebhyaḥ
Genitive	sāyatanasya	sāyatanayoḥ	sāyatanānām
Locative	sāyatane	sāyatanayoḥ	sāyataneṣu

Compound sāyatana -

Adverb -sāyatanam -sāyatanāt