Declension table of ?devatāyatana

Neuter	Singular	Dual	Plural
Nominative	devatāyatanam	devatāyatane	devatāyatanāni
Vocative	devatāyatana	devatāyatane	devatāyatanāni
Accusative	devatāyatanam	devatāyatane	devatāyatanāni
Instrumental	devatāyatanena	devatāyatanābhyām	devatāyatanaiḥ
Dative	devatāyatanāya	devatāyatanābhyām	devatāyatanebhyaḥ
Ablative	devatāyatanāt	devatāyatanābhyām	devatāyatanebhyaḥ
Genitive	devatāyatanasya	devatāyatanayoḥ	devatāyatanānām
Locative	devatāyatane	devatāyatanayoḥ	devatāyataneṣu

Compound devatāyatana -

Adverb -devatāyatanam -devatāyatanāt