Declension table of ?yamasāna

Neuter	Singular	Dual	Plural
Nominative	yamasānam	yamasāne	yamasānāni
Vocative	yamasāna	yamasāne	yamasānāni
Accusative	yamasānam	yamasāne	yamasānāni
Instrumental	yamasānena	yamasānābhyām	yamasānaiḥ
Dative	yamasānāya	yamasānābhyām	yamasānebhyaḥ
Ablative	yamasānāt	yamasānābhyām	yamasānebhyaḥ
Genitive	yamasānasya	yamasānayoḥ	yamasānānām
Locative	yamasāne	yamasānayoḥ	yamasāneṣu

Compound yamasāna -

Adverb -yamasānam -yamasānāt