Declension table of ?sāyatana

Neuter	Singular	Dual	Plural
Nominative	sāyatanam	sāyatane	sāyatanāni
Vocative	sāyatana	sāyatane	sāyatanāni
Accusative	sāyatanam	sāyatane	sāyatanāni
Instrumental	sāyatanena	sāyatanābhyām	sāyatanaiḥ
Dative	sāyatanāya	sāyatanābhyām	sāyatanebhyaḥ
Ablative	sāyatanāt	sāyatanābhyām	sāyatanebhyaḥ
Genitive	sāyatanasya	sāyatanayoḥ	sāyatanānām
Locative	sāyatane	sāyatanayoḥ	sāyataneṣu

Compound sāyatana -

Adverb -sāyatanam -sāyatanāt