Declension table of ?śayanastha

Neuter	Singular	Dual	Plural
Nominative	śayanastham	śayanasthe	śayanasthāni
Vocative	śayanastha	śayanasthe	śayanasthāni
Accusative	śayanastham	śayanasthe	śayanasthāni
Instrumental	śayanasthena	śayanasthābhyām	śayanasthaiḥ
Dative	śayanasthāya	śayanasthābhyām	śayanasthebhyaḥ
Ablative	śayanasthāt	śayanasthābhyām	śayanasthebhyaḥ
Genitive	śayanasthasya	śayanasthayoḥ	śayanasthānām
Locative	śayanasthe	śayanasthayoḥ	śayanastheṣu

Compound śayanastha -

Adverb -śayanastham -śayanasthāt