Declension table of ?manasin

Masculine	Singular	Dual	Plural
Nominative	manasī	manasinau	manasinaḥ
Vocative	manasin	manasinau	manasinaḥ
Accusative	manasinam	manasinau	manasinaḥ
Instrumental	manasinā	manasibhyām	manasibhiḥ
Dative	manasine	manasibhyām	manasibhyaḥ
Ablative	manasinaḥ	manasibhyām	manasibhyaḥ
Genitive	manasinaḥ	manasinoḥ	manasinām
Locative	manasini	manasinoḥ	manasiṣu

Compound manasi -

Adverb -manasi